This entry includes miscellaneous geographic information of significance not included elsewhere.

Topic: Afghanistanlandlocked; the Hindu Kush mountains that run northeast to southwest divide the northern provinces from the rest of the country; the highest peaks are in the northern Vakhan (Wakhan Corridor)

Topic: AkrotiriBritish extraterritorial rights also extended to several small off-post sites scattered across Cyprus; of the Sovereign Base Area (SBA) land, 60% is privately owned and farmed, 20% is owned by the Ministry of Defense, and 20% is SBA Crown land

Topic: Albaniastrategic location along Strait of Otranto (links Adriatic Sea to Ionian Sea and Mediterranean Sea)

Topic: Algerialargest country in Africa but 80% desert; canyons and caves in the southern Hoggar Mountains and in the barren Tassili n'Ajjer area in the southeast of the country contain numerous examples of prehistoric art - rock paintings and carvings depicting human activities and wild and domestic animals (elephants, giraffes, cattle) - that date to the African Humid Period, roughly 11,000 to 5,000 years ago, when the region was completely vegetated

Topic: American SamoaPago Pago has one of the best natural deepwater harbors in the South Pacific Ocean, sheltered by shape from rough seas and protected by peripheral mountains from high winds; strategic location in the South Pacific Ocean

Topic: Andorralandlocked; straddles a number of important crossroads in the Pyrenees

Topic: Angolathe province of Cabinda is an exclave, separated from the rest of the country by the Democratic Republic of the Congo

Topic: Anguillathe most northerly of the Leeward Islands in the Lesser Antilles

Topic: Antarcticathe coldest, windiest, highest (on average), and driest continent; during summer, more solar radiation reaches the surface at the South Pole than is received at the Equator in an equivalent period

mostly uninhabitable, 99% of the land area is covered by the Antarctic ice sheet, the largest single mass of ice on earth covering an area of 14 million sq km (5.4 million sq mi) and containing 26.5 million cu km (6.4 million cu mi) of ice (this is almost 62% of all of the world's fresh water); if all this ice were converted to liquid water, one estimate is that it would be sufficient to raise the height of the world's oceans by 58 m (190 ft)

Topic: Antigua and BarbudaAntigua has a deeply indented shoreline with many natural harbors and beaches; Barbuda has a large western harbor

Topic: Arctic Oceanmajor chokepoint is the southern Chukchi Sea (northern access to the Pacific Ocean via the Bering Strait); strategic location between North America and Russia; shortest marine link between the extremes of eastern and western Russia; floating research stations operated by the US and Russia; maximum snow cover in March or April about 20 to 50 centimeters over the frozen ocean; snow cover lasts about 10 months

Topic: Argentinanote 1: second-largest country in South America (after Brazil); strategic location relative to sea lanes between the South Atlantic and the South Pacific Oceans (Strait of Magellan, Beagle Channel, Drake Passage); diverse geophysical landscapes range from tropical climates in the north to tundra in the far south; Cerro Aconcagua is the Western Hemisphere's tallest mountain, while Laguna del Carbon is the lowest point in the Western Hemisphere; shares Iguazu Falls, the world's largest waterfalls system, with Brazil

note 2: southeast Bolivia and northwest Argentina seem to be the original development site for peanuts

Topic: Armenialandlocked in the Lesser Caucasus Mountains; Sevana Lich (Lake Sevan) is the largest lake in this mountain range

Topic: Arubaa flat, riverless island renowned for its white sand beaches; its tropical climate is moderated by constant trade winds from the Atlantic Ocean; the temperature is almost constant at about 27 degrees Celsius (81 degrees Fahrenheit)

Topic: Ashmore and Cartier IslandsAshmore Reef National Nature Reserve established in August 1983; Cartier Island Marine Reserve established in 2000

Topic: Atlantic Oceanmajor chokepoints include the Dardanelles, Strait of Gibraltar, access to the Panama and Suez Canals; strategic straits include the Strait of Dover, Straits of Florida, Mona Passage, The Sound (Oresund), and Windward Passage; the Equator divides the Atlantic Ocean into the North Atlantic Ocean and South Atlantic Ocean

Topic: Australianote 1: world's smallest continent but sixth-largest country; the largest country in Oceania, the largest country entirely in the Southern Hemisphere, and the largest country without land borders

note 2: the Great Dividing Range that runs along eastern Australia is that continent’s longest mountain range and the third-longest land-based range in the world; the term "Great Dividing Range" refers to the fact that the mountains form a watershed crest from which all of the rivers of eastern Australia flow – east, west, north, and south

note 3: Australia is the only continent without glaciers; it is the driest inhabited continent on earth, making it particularly vulnerable to the challenges of climate change; the invigorating sea breeze known as the "Fremantle Doctor" affects the city of Perth on the west coast and is one of the most consistent winds in the world; Australia is home to 10% of the world's biodiversity, and a great number of its flora and fauna exist nowhere else in the world

Topic: Austrianote 1: landlocked; strategic location at the crossroads of central Europe with many easily traversable Alpine passes and valleys; major river is the Danube; population is concentrated on eastern lowlands because of steep slopes, poor soils, and low temperatures elsewhere

note 2: the world's largest and longest ice cave system at 42 km (26 mi) is the Eisriesenwelt (Ice Giants World) inside the Hochkogel mountain near Werfen, about 40 km south of Salzburg; ice caves are bedrock caves that contain year-round ice formations; they differ from glacial caves, which are transient and are formed by melting ice and flowing water within and under glaciers

Topic: Azerbaijanboth the main area of the country and the Naxcivan exclave are landlocked

Topic: Bahamas, Thestrategic location adjacent to US and Cuba; extensive island chain of which 30 are inhabited

Topic: Bahrainclose to primary Middle Eastern petroleum sources; strategic location in Persian Gulf, through which much of the Western world's petroleum must transit to reach open ocean

Topic: Bangladeshmost of the country is situated on deltas of large rivers flowing from the Himalayas: the Ganges unites with the Jamuna (main channel of the Brahmaputra) and later joins the Meghna to eventually empty into the Bay of Bengal

Topic: Barbadoseasternmost Caribbean island

Topic: Belaruslandlocked; glacial scouring accounts for the flatness of Belarusian terrain and for its 11,000 lakes

Topic: Belgiumcrossroads of Western Europe; most West European capitals are within 1,000 km of Brussels, the seat of both the European Union and NATO

Topic: Belizeonly country in Central America without a coastline on the North Pacific Ocean

Topic: Beninsandbanks create difficult access to a coast with no natural harbors, river mouths, or islands

Topic: Bermudaconsists of about 138 coral islands and islets with ample rainfall, but no rivers or freshwater lakes; some land was leased by the US Government from 1941 to 1995

Topic: Bhutanlandlocked; strategic location between China and India; controls several key Himalayan mountain passes

Topic: Bolivianote 1: landlocked; shares control of Lago Titicaca, world's highest navigable lake (elevation 3,805 m), with Peru

note 2: the southern regions of Peru and the extreme northwestern part of Bolivia are considered to be the place of origin for the common potato, while southeast Bolivia and northwest Argentina seem to be the original development site for peanuts

Topic: Bosnia and Herzegovinawithin Bosnia and Herzegovina's recognized borders, the country is divided into a joint Bosniak/Croat Federation (about 51% of the territory) and the Bosnian Serb-led Republika Srpska or RS (about 49% of the territory); the region called Herzegovina is contiguous to Croatia and Montenegro, and traditionally has been settled by an ethnic Croat majority in the west and an ethnic Serb majority in the east

Topic: Botswanalandlocked; population concentrated in the southern and eastern parts of the country

Topic: Bouvet Islandalmost entirely covered by glacial ice (93%); declared a nature reserve by Norway; the distance from Bouvet Island to Norway is 12,776 km, which is almost one-third the circumference of the earth

Topic: Brazilnote 1: largest country in South America and in the Southern Hemisphere; shares common boundaries with every South American country except Chile and Ecuador; most of the Pantanal, the world's largest tropical wetland, extends through the west central part of the country; shares Iguazu Falls, the world's largest waterfalls system, with Argentina

note 2: cassava (manioc) the sixth most important food crop in the world - after maize, rice, wheat, potatoes, and soybeans - seems to have originated in the west-central part of Brazil; pineapples are probably indigenous to the southern Brazil-Paraguay region

Topic: British Indian Ocean Territorynote 1: archipelago of 55 islands; Diego Garcia, the largest and southernmost island, occupies a strategic location in the central Indian Ocean; the island is the site of a joint US-UK military facility note 2: Diego Garcia is the only inhabited island of the BIOT and one of only two British territories where traffic drives on the right, the other being Gibraltarnote 1: archipelago of 55 islands; Diego Garcia, the largest and southernmost island, occupies a strategic location in the central Indian Ocean; the island is the site of a joint US-UK military facilitynote 2: Diego Garcia is the only inhabited island of the BIOT and one of only two British territories where traffic drives on the right, the other being Gibraltar

Topic: British Virgin Islandsstrong ties to nearby US Virgin Islands and Puerto Rico

Topic: Bruneiclose to vital sea lanes through South China Sea linking Indian and Pacific Oceans; two parts physically separated by Malaysia; the eastern part, the Temburong district, is an exclave and is almost an enclave within Malaysia

Topic: Bulgariastrategic location near Turkish Straits; controls key land routes from Europe to Middle East and Asia

Topic: Burkina Fasolandlocked savanna cut by the three principal rivers of the Black, Red, and White Voltas

Topic: Burmastrategic location near major Indian Ocean shipping lanes; the north-south flowing Irrawaddy River is the country's largest and most important commercial waterway

Topic: Burundilandlocked; straddles crest of the Nile-Congo watershed; the Kagera, which drains into Lake Victoria, is the most remote headstream of the White Nile

Topic: Cabo Verdestrategic location 500 km from west coast of Africa near major north-south sea routes; important communications station; important sea and air refueling site; one of four North Atlantic archipelagos that make up Macaronesia; the others are Azores (Portugal), Canary Islands (Spain), and Madeira (Portugal)

Topic: Cambodiaa land of paddies and forests dominated by the Mekong River and Tonle Sap (Southeast Asia's largest freshwater lake)

Topic: Cameroonsometimes referred to as the hinge of Africa because of its central location on the continent and its position at the west-south juncture of the Gulf of Guinea; throughout the country there are areas of thermal springs and indications of current or prior volcanic activity; Mount Cameroon, the highest mountain in Sub-Saharan west Africa, is an active volcano

Topic: Canadanote 1: second-largest country in world (after Russia) and largest in the Americas; strategic location between Russia and US via north polar route; approximately 90% of the population is concentrated within 160 km (100 mi) of the US border note 2: Canada has more fresh water than any other country and almost 9% of Canadian territory is water; Canada has at least 2 million and possibly over 3 million lakes - that is more than all other countries combinednote 1: second-largest country in world (after Russia) and largest in the Americas; strategic location between Russia and US via north polar route; approximately 90% of the population is concentrated within 160 km (100 mi) of the US bordernote 2: Canada has more fresh water than any other country and almost 9% of Canadian territory is water; Canada has at least 2 million and possibly over 3 million lakes - that is more than all other countries combined

Topic: Cayman Islandsimportant location between Cuba and Central America

Topic: Central African Republiclandlocked; almost the precise center of Africa

Topic: Chadnote 1: Chad is the largest of Africa's 16 landlocked countries note 2: not long ago - geologically speaking - what is today the Sahara was green savannah teeming with wildlife; during the African Humid Period, roughly 11,000 to 5,000 years ago, a vibrant animal community, including elephants, giraffes, hippos, and antelope lived there; the last remnant of the "Green Sahara" exists in the Lakes of Ounianga (oo-nee-ahn-ga) in northern Chad, a series of 18 interconnected freshwater, saline, and hypersaline lakes now protected as a World Heritage site note 3: Lake Chad, the most significant water body in the Sahel, is a remnant of a former inland sea, paleolake Mega-Chad; at its greatest extent, sometime before 5000 B.C., Lake Mega-Chad was the largest of four Saharan paleolakes that existed during the African Humid Period; it covered an area of about 400,000 sq km (150,000 sq mi), roughly the size of today's Caspian Seanote 1: Chad is the largest of Africa's 16 landlocked countriesnote 2: not long ago - geologically speaking - what is today the Sahara was green savannah teeming with wildlife; during the African Humid Period, roughly 11,000 to 5,000 years ago, a vibrant animal community, including elephants, giraffes, hippos, and antelope lived there; the last remnant of the "Green Sahara" exists in the Lakes of Ounianga (oo-nee-ahn-ga) in northern Chad, a series of 18 interconnected freshwater, saline, and hypersaline lakes now protected as a World Heritage sitenote 3: Lake Chad, the most significant water body in the Sahel, is a remnant of a former inland sea, paleolake Mega-Chad; at its greatest extent, sometime before 5000 B.C., Lake Mega-Chad was the largest of four Saharan paleolakes that existed during the African Humid Period; it covered an area of about 400,000 sq km (150,000 sq mi), roughly the size of today's Caspian Sea

Topic: Chilenote 1: the longest north-south trending country in the world, extending across 39 degrees of latitude; strategic location relative to sea lanes between the Atlantic and Pacific Oceans (Strait of Magellan, Beagle Channel, Drake Passage) note 2: Chile is one of the countries along the Ring of Fire, a belt of active volcanoes and earthquake epicenters bordering the Pacific Ocean; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Fire note 3: the Atacama Desert - the driest desert in the world - spreads across the northern part of the country; Ojos del Salado (6,893 m) in the Atacama Desert is the highest active volcano in the world, Chile's tallest mountain, and the second highest in the Western Hemisphere and the Southern Hemisphere - its small crater lake (at 6,390 m) is the world's highest lake note 1: the longest north-south trending country in the world, extending across 39 degrees of latitude; strategic location relative to sea lanes between the Atlantic and Pacific Oceans (Strait of Magellan, Beagle Channel, Drake Passage)note 2: Chile is one of the countries along the Ring of Fire, a belt of active volcanoes and earthquake epicenters bordering the Pacific Ocean; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Firenote 3: the Atacama Desert - the driest desert in the world - spreads across the northern part of the country; Ojos del Salado (6,893 m) in the Atacama Desert is the highest active volcano in the world, Chile's tallest mountain, and the second highest in the Western Hemisphere and the Southern Hemisphere - its small crater lake (at 6,390 m) is the world's highest lake

Topic: Chinanote 1: world's fourth largest country (after Russia, Canada, and US) and largest country situated entirely in Asia; Mount Everest on the border with Nepal is the world's tallest peak above sea level

note 2: the largest cave chamber in the world is the Miao Room, in the Gebihe cave system at China's Ziyun Getu He Chuandong National Park, which encloses some 10.78 million cu m (380.7 million cu ft) of volume

note 3: China appears to have been the center of domestication for two of the world's leading cereal crops: millet in the north along the Yellow River and rice in the south along the lower or middle Yangtze River

Topic: Christmas Islandlocated along major sea lanes of the Indian Ocean

Topic: Clipperton Islandthe atoll reef is approximately 12 km (7.5 mi) in circumference; an attempt to colonize the atoll in the early 20th century ended in disaster and was abandoned in 1917

Topic: Cocos (Keeling) Islandsnote 1: there are 27 coral islands in the group; apart from North Keeling Island, which lies 30 km north of the main group, the islands form a horseshoe-shaped atoll surrounding a lagoon; North Keeling Island was declared a national park in 1995 and is administered by Parks Australia; the population on the two inhabited islands generally is split between the ethnic Europeans on West Island and the ethnic Malays on Home Island; the islands are thickly covered with coconut palms and other vegetation

note 2: site of a World War I naval battle in November 1914 between the Australian light cruiser HMAS Sydney and the German raider SMS Emden; after being heavily damaged in the engagement, the Emden was beached by her captain on North Keeling Island

Topic: Colombiaonly South American country with coastlines on both the North Pacific Ocean and Caribbean Sea

Topic: Comorosimportant location at northern end of Mozambique Channel; the only Arab League country that lies entirely in the Southern Hemisphere

Topic: Congo, Democratic Republic of thenote 1: second largest country in Africa (after Algeria) and largest country in Sub-Saharan Africa; straddles the equator; dense tropical rain forest in central river basin and eastern highlands; the narrow strip of land that controls the lower Congo River is the DRC's only outlet to the South Atlantic Ocean note 2: because of its speed, cataracts, rapids, and turbulence the Congo River, most of which flows through the DRC, has never been accurately measured along much of its length; nonetheless, it is conceded to be the deepest river in the world; estimates of its greatest depth vary between 220 and 250 metersnote 1: second largest country in Africa (after Algeria) and largest country in Sub-Saharan Africa; straddles the equator; dense tropical rain forest in central river basin and eastern highlands; the narrow strip of land that controls the lower Congo River is the DRC's only outlet to the South Atlantic Oceannote 2: because of its speed, cataracts, rapids, and turbulence the Congo River, most of which flows through the DRC, has never been accurately measured along much of its length; nonetheless, it is conceded to be the deepest river in the world; estimates of its greatest depth vary between 220 and 250 meters

Topic: Congo, Republic of theabout 70% of the population lives in Brazzaville, Pointe-Noire, or along the railroad between them

Topic: Cook Islandsthe northern Cook Islands are seven low-lying, sparsely populated, coral atolls; the southern Cook Islands, where most of the population lives, consist of eight elevated, fertile, volcanic isles, including the largest, Rarotonga, at 67 sq km

Topic: Coral Sea Islandsimportant nesting area for birds and turtles

Topic: Costa Ricafour volcanoes, two of them active, rise near the capital of San Jose in the center of the country; one of the volcanoes, Irazu, erupted destructively in 1963-65

Topic: Cote d'Ivoiremost of the inhabitants live along the sandy coastal region; apart from the capital area, the forested interior is sparsely populated

Topic: Croatiacontrols most land routes from Western Europe to Aegean Sea and Turkish Straits; most Adriatic Sea islands lie off the coast of Croatia - some 1,200 islands, islets, ridges, and rocks

Topic: Cubalargest country in Caribbean and westernmost island of the Greater Antilles

Topic: CuracaoCuracao is a part of the Windward Islands (southern) group in the Lesser AntillesCuracao is a part of the Windward Islands (southern) group in the Lesser Antilles

Topic: Cyprusthe third largest island in the Mediterranean Sea (after Sicily and Sardinia); several small Cypriot enclaves exist within the Dhekelia Sovereign Base Area

Topic: Czechianote 1: landlocked; strategically located astride some of oldest and most significant land routes in Europe; Moravian Gate is a traditional military corridor between the North European Plain and the Danube in central Europe

note 2: the Hranice Abyss in Czechia is the world's deepest surveyed underwater cave at 404 m (1,325 ft); its survey is not complete and it could end up being some 800-1,200 m deep

Topic: Denmarkcomposed of the Jutland Peninsula and a group of more than 400 islands (Danish Archipelago); controls Danish Straits (Skagerrak and Kattegat) linking Baltic and North Seas; about one-quarter of the population lives in greater Copenhagen

Topic: DhekeliaBritish extraterritorial rights also extended to several small off-post sites scattered across Cyprus; several small Cypriot enclaves exist within the Sovereign Base Area (SBA); of the SBA land, 60% is privately owned and farmed, 20% is owned by the Ministry of Defense, and 20% is SBA Crown land

Topic: Djiboutistrategic location near world's busiest shipping lanes and close to Arabian oilfields; terminus of rail traffic into Ethiopia; mostly wasteland; Lac Assal (Lake Assal) is the lowest point in Africa and the saltiest lake in the world

Topic: Dominicaknown as "The Nature Island of the Caribbean" due to its spectacular, lush, and varied flora and fauna, which are protected by an extensive natural park system; the most mountainous of the Lesser Antilles, its volcanic peaks are cones of lava craters and include Boiling Lake, the second-largest, thermally active lake in the world

Topic: Dominican Republicshares island of Hispaniola with Haiti (eastern two-thirds makes up the Dominican Republic, western one-third is Haiti); the second largest country in the Antilles (after Cuba); geographically diverse with the Caribbean's tallest mountain, Pico Duarte, and lowest elevation and largest lake, Lago Enriquillo

Topic: Ecuadornote 1: Cotopaxi in Andes is highest active volcano in world

note 2: genetic research indicates that the cherry-sized tomato originated in Ecuador without any human domestication; later domestication in Mexico transformed the plant into the large modern tomato; archeological research indicates that the cacao tree, whose seeds are used to make chocolate and which was long thought to have originated in Mesoamerica, was first domesticated in the upper Amazon region of northwest South America - present-day Ecuador - about 3,300 B.C.

Topic: Egyptnote: controls Sinai Peninsula, the only land bridge between Africa and remainder of Eastern Hemisphere; controls Suez Canal, a sea link between Indian Ocean and Mediterranean Sea; size, and juxtaposition to Israel, establish its major role in Middle Eastern geopolitics; dependence on upstream neighbors; dominance of Nile basin issues; prone to influxes of refugees from Sudan and the Palestinian territories

Topic: El Salvadorsmallest Central American country and only one without a coastline on the Caribbean Sea

Topic: Equatorial Guineainsular and continental regions widely separated; despite its name, no part of the Equator passes through Equatorial Guinea; the mainland part of the country is located just north of the Equator

Topic: Eritreastrategic geopolitical position along world's busiest shipping lanes; Eritrea retained the entire coastline of Ethiopia along the Red Sea upon de jure independence from Ethiopia on 24 May 1993

Topic: Estoniathe mainland terrain is flat, boggy, and partly wooded; offshore lie more than 1,500 islands

Topic: Eswatinilandlocked; almost completely surrounded by South Africa

Topic: Ethiopianote 1: landlocked - entire coastline along the Red Sea was lost with the de jure independence of Eritrea on 24 May 1993; Ethiopia is, therefore, the most populous landlocked country in the world; the Blue Nile, the chief headstream of the Nile by water volume, rises in T'ana Hayk (Lake Tana) in northwest Ethiopia

note 2: three major crops may have originated in Ethiopia: coffee (almost certainly), grain sorghum, and castor bean

Topic: Falkland Islands (Islas Malvinas)deeply indented coast provides good natural harbors; short growing season

Topic: Faroe Islandsarchipelago of 17 inhabited islands and one uninhabited island, and a few uninhabited islets; strategically located along important sea lanes in northeastern Atlantic; precipitous terrain limits habitation to small coastal lowlands

Topic: Fijiconsists of 332 islands, approximately 110 of which are inhabited, and more than 500 islets

Topic: Finlandlong boundary with Russia; Helsinki is northernmost national capital on European continent; population concentrated on small southwestern coastal plain

Topic: Francelargest West European nation; most major French rivers - the Meuse, Seine, Loire, Charente, Dordogne, and Garonne - flow northward or westward into the Atlantic Ocean, only the Rhone flows southward into the Mediterranean Sea

Topic: French Polynesiaincludes five archipelagoes: four volcanic (Iles Gambier, Iles Marquises, Iles Tubuai, Society Islands) and one coral (Archipel des Tuamotu); the Tuamotu Archipelago forms the largest group of atolls in the world - 78 in total, 48 inhabited; Makatea in the Tuamotu Archipelago is one of the three great phosphate rock islands in the Pacific Ocean - the others are Banaba (Ocean Island) in Kiribati and Nauru

Topic: French Southern and Antarctic Landsislands' component is widely scattered across remote locations in the southern Indian OceanBassas da India (Iles Eparses): atoll is a circular reef atop a long-extinct, submerged volcano; Europa Island and Juan de Nova Island (Iles Eparses): wildlife sanctuary for seabirds and sea turtles; Glorioso Island (Iles Eparses): islands and rocks are surrounded by an extensive reef system; Tromelin Island (Iles Eparses): climatologically important location for forecasting cyclones in the western Indian Ocean; wildlife sanctuary (seabirds, tortoises)islands' component is widely scattered across remote locations in the southern Indian OceanBassas da India (Iles Eparses): atoll is a circular reef atop a long-extinct, submerged volcano; Europa Island and Juan de Nova Island (Iles Eparses): wildlife sanctuary for seabirds and sea turtles; Glorioso Island (Iles Eparses): islands and rocks are surrounded by an extensive reef system; Tromelin Island (Iles Eparses): climatologically important location for forecasting cyclones in the western Indian Ocean; wildlife sanctuary (seabirds, tortoises)

Topic: Gabona small population and oil and mineral reserves have helped Gabon become one of Africa's wealthier countries; in general, these circumstances have allowed the country to maintain and conserve its pristine rain forest and rich biodiversity

Topic: Gambia, Thealmost an enclave of Senegal; smallest country on the African mainland

Topic: Gaza Striponce a strategic strip of land along Mideast-North African trade routes that has experienced an incredibly turbulent history; the town of Gaza itself has been besieged countless times in its history; Israel evacuated its civilian settlements and soldiers from the Gaza Strip in 2005

Topic: Georgianote 1: strategically located east of the Black Sea; Georgia controls much of the Caucasus Mountains and the routes through them

note 2: the world's four deepest caves are all in Georgia, including two that are the only known caves on earth deeper than 2,000 m: Krubera Cave at -2,197 m (-7,208 ft; reached in 2012) and Veryovkina Cave at -2,212 (-7,257 ft; reached in 2018)

Topic: Germanystrategic location on North European Plain and along the entrance to the Baltic Sea; most major rivers in Germany - the Rhine, Weser, Oder, Elbe - flow northward; the Danube, which originates in the Black Forest, flows eastward

Topic: GhanaLake Volta is the world's largest artificial lake (manmade reservoir) by surface area (8,482 sq km; 3,275 sq mi); the lake was created following the completion of the Akosombo Dam in 1965, which holds back the White Volta and Black Volta Rivers

Topic: Gibraltarnote 1: strategic location on Strait of Gibraltar that links the North Atlantic Ocean and Mediterranean Sea note 2: one of only two British territories where traffic drives on the right, the other being the island of Diego Garcia in the British Indian Ocean Territorynote 1: strategic location on Strait of Gibraltar that links the North Atlantic Ocean and Mediterranean Seanote 2: one of only two British territories where traffic drives on the right, the other being the island of Diego Garcia in the British Indian Ocean Territory

Topic: Greecestrategic location dominating the Aegean Sea and southern approach to Turkish Straits; a peninsular country, possessing an archipelago of about 2,000 islands

Topic: Greenlanddominates North Atlantic Ocean between North America and Europe; sparse population confined to small settlements along coast; close to one-quarter of the population lives in the capital, Nuuk; world's second largest ice sheet after that of Antarctica covering an area of 1.71 million sq km (660,000 sq mi) or about 79% of the island, and containing 2.85 million cu km (684 thousand cu mi) of ice (this is almost 7% of all of the world's fresh water); if all this ice were converted to liquid water, one estimate is that it would be sufficient to raise the height of the world's oceans by 7.2 m (24 ft)

Topic: Grenadathe administration of the islands of the Grenadines group is divided between Saint Vincent and the Grenadines and Grenada

Topic: Guamlargest and southernmost island in the Mariana Islands archipelago and the largest island in Micronesia; strategic location in western North Pacific Ocean

Topic: Guatemalanote 1: despite having both eastern and western coastlines (Caribbean Sea and Pacific Ocean respectively), there are no natural harbors on the west coast note 2: Guatemala is one of the countries along the Ring of Fire, a belt of active volcanoes and earthquake epicenters bordering the Pacific Ocean; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Firenote 1: despite having both eastern and western coastlines (Caribbean Sea and Pacific Ocean respectively), there are no natural harbors on the west coastnote 2: Guatemala is one of the countries along the Ring of Fire, a belt of active volcanoes and earthquake epicenters bordering the Pacific Ocean; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Fire

Topic: Guernseylarge, deepwater harbor at Saint Peter Port

Topic: Guineathe Niger and its important tributary the Milo River have their sources in the Guinean highlands

Topic: Guinea-Bissauthis small country is swampy along its western coast and low-lying inland

Topic: Guyanathe third-smallest country in South America after Suriname and Uruguay; substantial portions of its western and eastern territories are claimed by Venezuela and Suriname respectively; contains some of the largest unspoiled rainforests on the continent

Topic: Haitishares island of Hispaniola with Dominican Republic (western one-third is Haiti, eastern two-thirds is the Dominican Republic); it is the most mountainous nation in the Caribbean

Topic: Heard Island and McDonald IslandsMawson Peak on Heard Island is the highest Australian mountain (at 2,745 meters, it is taller than Mt. Kosciuszko in Australia proper), and one of only two active volcanoes located in Australian territory, the other being McDonald Island; in 1992, McDonald Island broke its dormancy and began erupting; it has erupted several times since, most recently in 2005

Topic: Holy See (Vatican City)landlocked; an enclave in Rome, Italy; world's smallest state; beyond the territorial boundary of Vatican City, the Lateran Treaty of 1929 grants the Holy See extraterritorial authority over 23 sites in Rome and five outside of Rome, including the Pontifical Palace at Castel Gandolfo (the Pope's summer residence)

Topic: Hondurashas only a short Pacific coast but a long Caribbean shoreline, including the virtually uninhabited eastern Mosquito Coast

Topic: Hong Kongconsists of a mainland area (the New Territories) and more than 200 islands

Topic: Hungarylandlocked; strategic location astride main land routes between Western Europe and Balkan Peninsula as well as between Ukraine and Mediterranean basin; the north-south flowing Duna (Danube) and Tisza Rivers divide the country into three large regions

Topic: Icelandstrategic location between Greenland and Europe; westernmost European country; Reykjavik is the northernmost national capital in the world; more land covered by glaciers than in all of continental Europe

Topic: Indiadominates South Asian subcontinent; near important Indian Ocean trade routes; Kanchenjunga, third tallest mountain in the world, lies on the border with Nepal

Topic: Indian Oceanmajor chokepoints include Bab el Mandeb, Strait of Hormuz, Strait of Malacca, southern access to the Suez Canal, and the Lombok Strait

Topic: Indonesianote 1: according to Indonesia's National Coordinating Agency for Survey and Mapping, the total number of islands in the archipelago is 13,466, of which 922 are permanently inhabited (Indonesia is the world's largest country comprised solely of islands); the country straddles the equator and occupies a strategic location astride or along major sea lanes from the Indian Ocean to the Pacific Ocean note 2: Indonesia is one of the countries along the Ring of Fire, a belt of active volcanoes and earthquake epicenters bordering the Pacific Ocean; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Fire; 80% of tsunamis, caused by volcanic or seismic events, occur within the "Pacific Ring of Fire" note 3: despite having the fourth largest population in the world, Indonesia is the most heavily forested region on earth after the Amazon

note 4: two major food crops apparently developed on the island of New Guinea: bananas and sugarcanenote 1: according to Indonesia's National Coordinating Agency for Survey and Mapping, the total number of islands in the archipelago is 13,466, of which 922 are permanently inhabited (Indonesia is the world's largest country comprised solely of islands); the country straddles the equator and occupies a strategic location astride or along major sea lanes from the Indian Ocean to the Pacific Oceannote 2: Indonesia is one of the countries along the Ring of Fire, a belt of active volcanoes and earthquake epicenters bordering the Pacific Ocean; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Fire; 80% of tsunamis, caused by volcanic or seismic events, occur within the "Pacific Ring of Fire"note 3: despite having the fourth largest population in the world, Indonesia is the most heavily forested region on earth after the Amazon

note 4: two major food crops apparently developed on the island of New Guinea: bananas and sugarcane

Topic: Iranstrategic location on the Persian Gulf and Strait of Hormuz, which are vital maritime pathways for crude oil transport

Topic: Iraqstrategic location on Shatt al Arab waterway and at the head of the Persian Gulf

Topic: Irelandstrategic location on major air and sea routes between North America and northern Europe; over 40% of the population resides within 100 km of Dublin

Topic: Isle of Manone small islet, the Calf of Man, lies to the southwest and is a bird sanctuary

Topic: Israelnote 1: Lake Tiberias (Sea of Galilee) is an important freshwater source; the Dead Sea is the second saltiest body of water in the world (after Lake Assal in Djibouti)

note 2: the Malham Cave in Mount Sodom is the world's longest salt cave at 10 km (6 mi); its survey is not complete and its length will undoubtedly increase; Mount Sodom is actually a hill some 220 m (722 ft) high that is 80% salt (multiple salt layers covered by a veneer of rock)

note 3: in March 2019, there were 380 Israeli settlements,to include 213 settlements and 132 outposts in the West Bank, and 35 settlements in East Jerusalem; there are no Israeli settlements in the Gaza Strip, as all were evacuated in 2005 (2019)

Topic: Italystrategic location dominating central Mediterranean as well as southern sea and air approaches to Western Europe

Topic: Jamaicathird largest island in the Caribbean (after Cuba and Hispaniola); strategic location between Cayman Trench and Jamaica Channel, the main sea lanes for the Panama Canal

Topic: Jan Mayenbarren volcanic spoon-shaped island with some moss and grass flora; island consists of two parts: a larger northeast Nord-Jan (the spoon "bowl") and the smaller Sor-Jan (the "handle"), linked by a 2.5 km-wide isthmus (the "stem") with two large lakes, Sorlaguna (South Lagoon) and Nordlaguna (North Lagoon)

Topic: Japannote 1: strategic location in northeast Asia; composed of four main islands - from north: Hokkaido, Honshu (the largest and most populous), Shikoku, and Kyushu (the "Home Islands") - and 6,848 smaller islands and islets note 2: Japan annually records the most earthquakes in the world; it is one of the countries along the Ring of Fire, a belt of active volcanoes and earthquake epicenters bordering the Pacific Ocean; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Firenote 1: strategic location in northeast Asia; composed of four main islands - from north: Hokkaido, Honshu (the largest and most populous), Shikoku, and Kyushu (the "Home Islands") - and 6,848 smaller islands and isletsnote 2: Japan annually records the most earthquakes in the world; it is one of the countries along the Ring of Fire, a belt of active volcanoes and earthquake epicenters bordering the Pacific Ocean; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Fire

Topic: Jerseylargest and southernmost of Channel Islands; about 30% of population concentrated in Saint Helier

Topic: Jordanstrategic location at the head of the Gulf of Aqaba and as the Arab country that shares the longest border with Israel and the occupied West Bank; the Dead Sea, the lowest point in Asia and the second saltiest body of water in the world (after Lac Assal in Djibouti), lies on Jordan's western border with Israel and the West Bank; Jordan is almost landlocked but does have a 26 km southwestern coastline with a single port, Al 'Aqabah (Aqaba)

Topic: Kazakhstanworld's largest landlocked country and one of only two landlocked countries in the world that extends into two continents (the other is Azerbaijan); Russia leases approximately 6,000 sq km of territory enclosing the Baikonur Cosmodrome; in January 2004, Kazakhstan and Russia extended the lease to 2050

Topic: Kenyathe Kenyan Highlands comprise one of the most successful agricultural production regions in Africa; glaciers are found on Mount Kenya, Africa's second highest peak; unique physiography supports abundant and varied wildlife of scientific and economic value; Lake Victoria, the world's largest tropical lake and the second largest fresh water lake, is shared among three countries: Kenya, Tanzania, and Uganda

Topic: Kiribati21 of the 33 islands are inhabited; Banaba (Ocean Island) in Kiribati is one of the three great phosphate rock islands in the Pacific Ocean - the others are Makatea in French Polynesia, and Nauru; Kiribati is the only country in the world to fall into all four hemispheres (northern, southern, eastern, and western)

Topic: Korea, Northstrategic location bordering China, South Korea, and Russia; mountainous interior is isolated and sparsely populated

Topic: Korea, Southstrategic location on Korea Strait; about 3,000 mostly small and uninhabited islands lie off the western and southern coasts

Topic: Kosovothe 41-km long Nerodimka River divides into two branches each of which flows into a different sea: the northern branch flows into the Sitnica River, which via the Ibar, Morava, and Danube Rivers ultimately flows into the Black Sea; the southern branch flows via the Lepenac and Vardar Rivers into the Aegean Sea

Topic: Kuwaitstrategic location at head of Persian Gulf

Topic: Kyrgyzstanlandlocked; entirely mountainous, dominated by the Tien Shan range; 94% of the country is 1,000 m above sea level with an average elevation of 2,750 m; many tall peaks, glaciers, and high-altitude lakes

Topic: Laoslandlocked; most of the country is mountainous and thickly forested; the Mekong River forms a large part of the western boundary with Thailand

Topic: Latviamost of the country is composed of fertile low-lying plains with some hills in the east

Topic: Lebanonsmallest country in continental Asia; Nahr el Litani is the only major river in Near East not crossing an international boundary; rugged terrain historically helped isolate, protect, and develop numerous factional groups based on religion, clan, and ethnicity

Topic: Lesotholandlocked, an enclave of (completely surrounded by) South Africa; mountainous, more than 80% of the country is 1,800 m above sea level

Topic: Liberiafacing the Atlantic Ocean, the coastline is characterized by lagoons, mangrove swamps, and river-deposited sandbars; the inland grassy plateau supports limited agriculture

Topic: Libyanote 1: more than 90% of the country is desert or semidesert

note 2: the volcano Waw an Namus lies in south central Libya in the middle of the Sahara; the caldera is an oasis - the name means "oasis of mosquitoes" - containing several small lakes surrounded by vegetation and hosting various insects and a large diversity of birds

Topic: Liechtensteinalong with Uzbekistan, one of only two doubly landlocked countries in the world; variety of microclimatic variations based on elevation

Topic: Lithuaniafertile central plains are separated by hilly uplands that are ancient glacial deposits

Topic: Luxembourglandlocked; the only grand duchy in the world

Topic: Macauessentially urban; an area of land reclaimed from the sea measuring 5.2 sq km and known as Cotai now connects the islands of Coloane and Taipa; the island area is connected to the mainland peninsula by three bridges

Topic: Madagascarworld's fourth-largest island; strategic location along Mozambique Channel; despite Madagascar’s close proximity to the African continent, ocean currents isolate the island resulting in high rates of endemic plant and animal species; approximately 90% of the flora and fauna on the island are found nowhere else

Topic: Malawilandlocked; Lake Nyasa, some 580 km long, is the country's most prominent physical feature; it contains more fish species than any other lake on earth

Topic: Malaysiastrategic location along Strait of Malacca and southern South China Sea

Topic: Maldivessmallest Asian country; archipelago of 1,190 coral islands grouped into 26 atolls (200 inhabited islands, plus 80 islands with tourist resorts); strategic location astride and along major sea lanes in Indian Ocean

Topic: Malilandlocked; divided into three natural zones: the southern, cultivated Sudanese; the central, semiarid Sahelian; and the northern, arid Saharan

Topic: Maltathe country comprises an archipelago, with only the three largest islands (Malta, Ghawdex or Gozo, and Kemmuna or Comino) inhabited; numerous bays provide good harbors; Malta and Tunisia are discussing oil exploration on the continental shelf between their countries, although no commercially viable reserves have been found as of 2017

Topic: Marshall Islandsthe islands of Bikini and Enewetak are former US nuclear test sites; Kwajalein atoll, famous as a World War II battleground, surrounds the world's largest lagoon and is used as a US missile test range; the island city of Ebeye is the second largest settlement in the Marshall Islands, after the capital of Majuro, and one of the most densely populated locations in the Pacific

Topic: MauritaniaMauritania is considered both a part of North Africa's Maghreb region and West Africa's Sahel region; most of the population is concentrated in the cities of Nouakchott and Nouadhibou and along the Senegal River in the southern part of the country

Topic: Mauritiusthe main island, from which the country derives its name, is of volcanic origin and is almost entirely surrounded by coral reefs; former home of the dodo, a large flightless bird related to pigeons, driven to extinction by the end of the 17th century through a combination of hunting and the introduction of predatory species

Topic: Mexiconote 1: strategic location on southern border of the US; Mexico is one of the countries along the Ring of Fire, a belt of active volcanoes and earthquake epicenters bordering the Pacific Ocean; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Fire note 2: some of the world's most important food crops were first domesticated in Mexico; the "Three Sisters" companion plants - winter squash, maize (corn), and climbing beans - served as the main agricultural crops for various North American Indian groups; all three apparently originated in Mexico but then were widely disseminated through much of North America; avocado, amaranth, and chili peppers also emanate from Mexico, as does vanilla, the world's most popular aroma and flavor spice; although cherry tomatoes originated in Ecuador, their domestication in Mexico transformed them into the larger modern tomato

note 3: the Sac Actun cave system at 348 km (216 mi) is the longest underwater cave in the world and the second longest cave worldwide, after Mammoth Cave in the United States (see "Geography - note" under United States)

note 4: the prominent Yucatan Peninsula that divides the Gulf of Mexico from the Caribbean Sea is shared by Mexico, Guatemala, and Belize; just on the northern coast of Yucatan, near the town of Chicxulub (pronounce cheek-sha-loob), lie the remnants of a massive crater (some 150 km in diameter and extending well out into the Gulf of Mexico); formed by an asteroid or comet when it struck the earth 66 million years ago, the impact is now widely accepted as initiating a worldwide climate disruption that caused a mass extinction of 75% of all the earth's plant and animal species - including the non-avian dinosaursnote 1: strategic location on southern border of the US; Mexico is one of the countries along the Ring of Fire, a belt of active volcanoes and earthquake epicenters bordering the Pacific Ocean; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Firenote 2: some of the world's most important food crops were first domesticated in Mexico; the "Three Sisters" companion plants - winter squash, maize (corn), and climbing beans - served as the main agricultural crops for various North American Indian groups; all three apparently originated in Mexico but then were widely disseminated through much of North America; avocado, amaranth, and chili peppers also emanate from Mexico, as does vanilla, the world's most popular aroma and flavor spice; although cherry tomatoes originated in Ecuador, their domestication in Mexico transformed them into the larger modern tomato

note 3: the Sac Actun cave system at 348 km (216 mi) is the longest underwater cave in the world and the second longest cave worldwide, after Mammoth Cave in the United States (see "Geography - note" under United States)

note 4: the prominent Yucatan Peninsula that divides the Gulf of Mexico from the Caribbean Sea is shared by Mexico, Guatemala, and Belize; just on the northern coast of Yucatan, near the town of Chicxulub (pronounce cheek-sha-loob), lie the remnants of a massive crater (some 150 km in diameter and extending well out into the Gulf of Mexico); formed by an asteroid or comet when it struck the earth 66 million years ago, the impact is now widely accepted as initiating a worldwide climate disruption that caused a mass extinction of 75% of all the earth's plant and animal species - including the non-avian dinosaurs

Topic: Micronesia, Federated States ofcomposed of four major island groups totaling 607 islands

Topic: Moldovalandlocked; well endowed with various sedimentary rocks and minerals including sand, gravel, gypsum, and limestone

Topic: Monacosecond-smallest independent state in the world (after the Holy See); smallest country with a coastline; almost entirely urban

Topic: Mongolialandlocked; strategic location between China and Russia

Topic: Montenegrostrategic location along the Adriatic coast

Topic: Montserratthe island is entirely volcanic in origin and comprised of three major volcanic centers of differing ages

Topic: Moroccostrategic location along Strait of Gibraltar; the only African nation to have both Atlantic and Mediterranean coastlines; the waters off the Atlantic coast are particularly rich fishing areas

Topic: Mozambiquethe Zambezi River flows through the north-central and most fertile part of the country

Topic: Namibiathe Namib Desert, after which the country is named, is considered to be the oldest desert in the world; Namibia is the first country in the world to incorporate the protection of the environment into its constitution; some 14% of the land is protected, including virtually the entire Namib Desert coastal strip; Namib-Naukluft National Park (49,768 sq km), is the largest game park in Africa and one of the largest in the world

Topic: NauruNauru is the third-smallest country in the world behind the Holy See (Vatican City) and Monaco; it is the smallest country in the Pacific Ocean, the smallest country outside Europe, the world's smallest island country, and the the world's smallest independent republic; situated just 53 km south of the Equator, Nauru is one of the three great phosphate rock islands in the Pacific Ocean - the others are Banaba (Ocean Island) in Kiribati and Makatea in French Polynesia

Topic: Navassa Islandstrategic location 160 km south of the US Naval Base at Guantanamo Bay, Cuba; mostly exposed rock with numerous solution holes (limestone sinkholes) but with enough grassland to support goat herds; dense stands of fig trees, scattered cactus

Topic: Nepallandlocked; strategic location between China and India; contains eight of world's 10 highest peaks, including Mount Everest and Kanchenjunga - the world's tallest and third tallest mountains - on the borders with China and India respectively

Topic: Netherlandslocated at mouths of three major European rivers (Rhine, Maas or Meuse, and Schelde); about a quarter of the country lies below sea level and only about half of the land exceeds one meter above sea level

Topic: New Caledoniaconsists of the main island of New Caledonia (one of the largest in the Pacific Ocean), the archipelago of Iles Loyaute, and numerous small, sparsely populated islands and atolls

Topic: New Zealandnote 1: consists of two main islands and a number of smaller islands; South Island, the larger main island, is the 12th largest island in the world and is divided along its length by the Southern Alps; North Island is the 14th largest island in the world and is not as mountainous, but it is marked by volcanism note 2: New Zealand lies along the Ring of Fire, a belt of active volcanoes and earthquake epicenters bordering the Pacific Ocean; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Fire note 3: almost 90% of the population lives in cities and over three-quarters on North Island; Wellington is the southernmost national capital in the worldnote 1: consists of two main islands and a number of smaller islands; South Island, the larger main island, is the 12th largest island in the world and is divided along its length by the Southern Alps; North Island is the 14th largest island in the world and is not as mountainous, but it is marked by volcanismnote 2: New Zealand lies along the Ring of Fire, a belt of active volcanoes and earthquake epicenters bordering the Pacific Ocean; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Firenote 3: almost 90% of the population lives in cities and over three-quarters on North Island; Wellington is the southernmost national capital in the world

Topic: Nicaragualargest country in Central America; contains the largest freshwater body in Central America, Lago de Nicaragua

Topic: Nigerlandlocked; one of the hottest countries in the world; northern four-fifths is desert, southern one-fifth is savanna, suitable for livestock and limited agriculture

Topic: Nigeriathe Niger River enters the country in the northwest and flows southward through tropical rain forests and swamps to its delta in the Gulf of Guinea

Topic: Niueone of world's largest coral islands; the only major break in the surrounding coral reef occurs in the central western part of the coast

Topic: Norfolk Islandmost of the 32 km coastline consists of almost inaccessible cliffs, but the land slopes down to the sea in one small southern area on Sydney Bay, where the capital of Kingston is situated

Topic: North Macedonialandlocked; major transportation corridor from Western and Central Europe to Aegean Sea and Southern Europe to Western Europe

Topic: Northern Mariana Islandsstrategic location in the North Pacific Ocean

Topic: Norwayabout two-thirds mountains; some 50,000 islands off its much-indented coastline; strategic location adjacent to sea lanes and air routes in North Atlantic; one of the most rugged and longest coastlines in the world

Topic: Omanconsists of Oman proper and two northern exclaves, Musandam and Al Madhah; the former is a peninsula that occupies a strategic location adjacent to the Strait of Hormuz, a vital transit point for world crude oil

Topic: Pacific Oceanthe major chokepoints are the Bering Strait, Panama Canal, Luzon Strait, and the Singapore Strait; the Equator divides the Pacific Ocean into the North Pacific Ocean and the South Pacific Ocean; dotted with low coral islands and rugged volcanic islands in the southwestern Pacific Ocean; much of the Pacific Ocean's rim lies along the Ring of Fire, a belt of active volcanoes and earthquake epicenters that accounts for up to 90% of the world's earthquakes and some 75% of the world's volcanoes; the Pacific Ocean is the deepest ocean basin averaging 4,000 m in depth

Topic: Pakistancontrols Khyber Pass and Bolan Pass, traditional invasion routes between Central Asia and the Indian Subcontinent

Topic: Palauwesternmost archipelago in the Caroline chain, consists of six island groups totaling more than 300 islands; includes World War II battleground of Beliliou (Peleliu) and world-famous Rock Islands

Topic: Panamastrategic location on eastern end of isthmus forming land bridge connecting North and South America; controls Panama Canal that links North Atlantic Ocean via Caribbean Sea with North Pacific Ocean

Topic: Papua New Guineanote 1: shares island of New Guinea with Indonesia; generally east-west trending highlands break up New Guinea into diverse ecoregions; one of world's largest swamps along southwest coast

note 2: two major food crops apparently developed on the island of New Guinea: bananas and sugarcane note 3: Papua New Guinea is one of the countries along the Ring of Fire, a belt of active volcanoes and earthquake epicenters bordering the Pacific Ocean; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Firenote 1: shares island of New Guinea with Indonesia; generally east-west trending highlands break up New Guinea into diverse ecoregions; one of world's largest swamps along southwest coast

note 2: two major food crops apparently developed on the island of New Guinea: bananas and sugarcanenote 3: Papua New Guinea is one of the countries along the Ring of Fire, a belt of active volcanoes and earthquake epicenters bordering the Pacific Ocean; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Fire

Topic: Paracel Islandscomposed of 130 small coral islands and reefs divided into the northeast Amphitrite Group and the western Crescent Group

Topic: Paraguaynote 1: landlocked; lies between Argentina, Bolivia, and Brazil; population concentrated in eastern and southern part of country

note 2: pineapples are probably indigenous to the southern Brazil-Paraguay region

Topic: Perunote 1: shares control of Lago Titicaca, world's highest navigable lake, with Bolivia; a remote slope of Nevado Mismi, a 5,316 m peak, is the ultimate source of the Amazon River note 2: Peru is one of the countries along the Ring of Fire, a belt of active volcanoes and earthquake epicenters bordering the Pacific Ocean; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Fire

note 3: on 19 February 1600, Mount Huaynaputina in the southern Peruvian Andes erupted in the largest volcanic explosion in South America in historical times; intermittent eruptions lasted until 5 March 1600 and pumped an estimated 16 to 32 million metric tons of particulates into the atmosphere reducing the amount of sunlight reaching the earth's surface and affecting weather worldwide; over the next two and a half years, millions died around the globe in famines from bitterly cold winters, cool summers, and the loss of crops and animals

note 4: the southern regions of Peru and the extreme northwestern part of Bolivia are considered to be the place of origin for the common potato note 1: shares control of Lago Titicaca, world's highest navigable lake, with Bolivia; a remote slope of Nevado Mismi, a 5,316 m peak, is the ultimate source of the Amazon Rivernote 2: Peru is one of the countries along the Ring of Fire, a belt of active volcanoes and earthquake epicenters bordering the Pacific Ocean; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Fire

note 3: on 19 February 1600, Mount Huaynaputina in the southern Peruvian Andes erupted in the largest volcanic explosion in South America in historical times; intermittent eruptions lasted until 5 March 1600 and pumped an estimated 16 to 32 million metric tons of particulates into the atmosphere reducing the amount of sunlight reaching the earth's surface and affecting weather worldwide; over the next two and a half years, millions died around the globe in famines from bitterly cold winters, cool summers, and the loss of crops and animals

note 4: the southern regions of Peru and the extreme northwestern part of Bolivia are considered to be the place of origin for the common potato

Topic: Philippinesnote 1: for decades, the Philippine archipelago was reported as having 7,107 islands; in 2016, the national mapping authority reported that hundreds of new islands had been discovered and increased the number of islands to 7,641 - though not all of the new islands have been verified; the country is favorably located in relation to many of Southeast Asia's main water bodies: the South China Sea, Philippine Sea, Sulu Sea, Celebes Sea, and Luzon Strait note 2: Philippines is one of the countries along the Ring of Fire, a belt of active volcanoes and earthquake epicenters bordering the Pacific Ocean; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Fire note 3: the Philippines sits astride the Pacific typhoon belt and an average of 9 typhoons make landfall on the islands each year - with about 5 of these being destructive; the country is the most exposed in the world to tropical stormsnote 1: for decades, the Philippine archipelago was reported as having 7,107 islands; in 2016, the national mapping authority reported that hundreds of new islands had been discovered and increased the number of islands to 7,641 - though not all of the new islands have been verified; the country is favorably located in relation to many of Southeast Asia's main water bodies: the South China Sea, Philippine Sea, Sulu Sea, Celebes Sea, and Luzon Straitnote 2: Philippines is one of the countries along the Ring of Fire, a belt of active volcanoes and earthquake epicenters bordering the Pacific Ocean; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Firenote 3: the Philippines sits astride the Pacific typhoon belt and an average of 9 typhoons make landfall on the islands each year - with about 5 of these being destructive; the country is the most exposed in the world to tropical storms

Topic: Pitcairn IslandsBritain's most isolated dependency; only the larger island of Pitcairn is inhabited but it has no port or natural harbor; supplies must be transported by rowed longboat from larger ships stationed offshore

Topic: Polandhistorically, an area of conflict because of flat terrain and the lack of natural barriers on the North European Plain

Topic: PortugalAzores and Madeira Islands occupy strategic locations along western sea approaches to Strait of Gibraltar; they are two of the four North Atlantic archipelagos that make up Macaronesia; the others are the Canary Islands (Spain) and Cabo Verde

Topic: Puerto Ricoimportant location along the Mona Passage - a key shipping lane to the Panama Canal; San Juan is one of the biggest and best natural harbors in the Caribbean; many small rivers and high central mountains ensure land is well watered; south coast relatively dry; fertile coastal plain belt in north

Topic: Qatarthe peninsula occupies a strategic location in the central Persian Gulf near major petroleum deposits

Topic: Romaniacontrols the most easily traversable land route between the Balkans, Moldova, and Ukraine; the Carpathian Mountains dominate the center of the country, while the Danube River forms much of the southern boundary with Serbia and Bulgaria

Topic: Russianote 1: largest country in the world in terms of area but unfavorably located in relation to major sea lanes of the world; despite its size, much of the country lacks proper soils and climates (either too cold or too dry) for agriculture note 2: Russia's far east, particularly the Kamchatka Peninsula, lies along the Ring of Fire, a belt of active volcanoes and earthquake epicenters bordering the Pacific Ocean; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Fire note 3: Mount El'brus is Europe's tallest peak; Lake Baikal, the deepest lake in the world, is estimated to hold one fifth of the world's fresh surface water

note 4: Kaliningrad oblast is an exclave annexed from Germany following World War II (it was formerly part of East Prussia); its capital city of Kaliningrad - formerly Koenigsberg - is the only Baltic port in Russia that remains ice free in the winternote 1: largest country in the world in terms of area but unfavorably located in relation to major sea lanes of the world; despite its size, much of the country lacks proper soils and climates (either too cold or too dry) for agriculturenote 2: Russia's far east, particularly the Kamchatka Peninsula, lies along the Ring of Fire, a belt of active volcanoes and earthquake epicenters bordering the Pacific Ocean; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Firenote 3: Mount El'brus is Europe's tallest peak; Lake Baikal, the deepest lake in the world, is estimated to hold one fifth of the world's fresh surface water

note 4: Kaliningrad oblast is an exclave annexed from Germany following World War II (it was formerly part of East Prussia); its capital city of Kaliningrad - formerly Koenigsberg - is the only Baltic port in Russia that remains ice free in the winter

Topic: Rwandalandlocked; most of the country is intensively cultivated and rugged with the population predominantly rural

Topic: Saint Barthelemya 1,200-hectare marine nature reserve, the Reserve Naturelle, is made up of five zones around the island that form a network to protect the island's coral reefs, seagrass, and endangered marine species

Topic: Saint Helena, Ascension, and Tristan da CunhaSaint Helena harbors at least 40 species of plants unknown elsewhere in the world; Ascension is a breeding ground for sea turtles and sooty terns; Queen Mary's Peak on Tristan da Cunha is the highest island mountain in the South Atlantic and a prominent landmark on the sea lanes around southern Africa

Topic: Saint Kitts and Nevissmallest country in the Western Hemisphere both in terms of area and population; with coastlines in the shape of a baseball bat and ball, the two volcanic islands are separated by a 3-km-wide channel called The Narrows; on the southern tip of long, baseball bat-shaped Saint Kitts lies the Great Salt Pond; Nevis Peak sits in the center of its almost circular namesake island and its ball shape complements that of its sister island

Topic: Saint Luciathe twin Pitons (Gros Piton and Petit Piton), striking cone-shaped peaks south of Soufriere, are one of the scenic natural highlights of the Caribbean

Topic: Saint Martinnote 1: the southern border is shared with Sint Maarten, a country within the Kingdom of the Netherlands; together, these two entities make up the smallest landmass in the world shared by two self-governing states

note 2: Simpson Bay Lagoon (aka as Simson Bay Lagoon or The Great Pond) is one of the largest inland lagoons in the West Indies; the border between the French and Dutch halves of the island of Saint Martin runs across the center of the lagoon, which is shared by both of the island's entities

Topic: Saint Pierre and Miquelonvegetation scanty; the islands are actually part of the northern Appalachians along with Newfoundland

Topic: Saint Vincent and the Grenadinesthe administration of the islands of the Grenadines group is divided between Saint Vincent and the Grenadines and Grenada; Saint Vincent and the Grenadines is comprised of 32 islands and cays

Topic: Samoaoccupies an almost central position within Polynesia

Topic: San Marinolandlocked; an enclave of (completely surrounded by) Italy; smallest independent state in Europe after the Holy See and Monaco; dominated by the Apennine Mountains

Topic: Sao Tome and Principethe second-smallest African country (after the Seychelles); the two main islands form part of a chain of extinct volcanoes and both are mountainous

Topic: Saudi ArabiaSaudi Arabia is the largest country in the world without a river; extensive coastlines on the Persian Gulf and Red Sea allow for considerable shipping (especially of crude oil) through the Persian Gulf and Suez Canal

Topic: Senegalwesternmost country on the African continent; The Gambia is almost an enclave within Senegal

Topic: Serbialandlocked; controls one of the major land routes from Western Europe to Turkey and the Near East

Topic: Seychellesthe smallest African country in terms of both area and population; the constitution of the Republic of Seychelles lists 155 islands: 42 granitic and 113 coralline; by far the largest island is Mahe, which is home to about 90% of the population and the site of the capital city of Victoria

Topic: Sierra Leonerainfall along the coast can reach 495 cm (195 inches) a year, making it one of the wettest places along coastal, western Africa

Topic: Singaporefocal point for Southeast Asian sea routes; consists of about 60 islands, by far the largest of which is Pulau Ujong; land reclamation has removed many former islands and created a number of new ones

Topic: Sint Maartennote 1: the northern border is shared with the French overseas collectivity of Saint Martin; together, these two entities make up the smallest landmass in the world shared by two self-governing states

note 2: Simpson Bay Lagoon (aka as Simson Bay Lagoon or The Great Pond) is one of the largest inland lagoons in the West Indies; the border between the French and Dutch halves of the island of Saint Martin runs across the center of the lagoon, which is shared by both of the island's entitiesnote 1: the northern border is shared with the French overseas collectivity of Saint Martin; together, these two entities make up the smallest landmass in the world shared by two self-governing states

note 2: Simpson Bay Lagoon (aka as Simson Bay Lagoon or The Great Pond) is one of the largest inland lagoons in the West Indies; the border between the French and Dutch halves of the island of Saint Martin runs across the center of the lagoon, which is shared by both of the island's entities

Topic: Slovakialandlocked; most of the country is rugged and mountainous; the Tatra Mountains in the north are interspersed with many scenic lakes and valleys

Topic: Sloveniadespite its small size, this eastern Alpine country controls some of Europe's major transit routes

Topic: Solomon Islandsstrategic location on sea routes between the South Pacific Ocean, the Solomon Sea, and the Coral Sea; Rennell Island, the southernmost in the Solomon Islands chain, is one of the world’s largest raised coral atolls; the island’s Lake Tegano, formerly a lagoon on the atoll, is the largest lake in the insular Pacific (15,500 hectares)

Topic: Somaliastrategic location on Horn of Africa along southern approaches to Bab el Mandeb and route through Red Sea and Suez Canal

Topic: South AfricaSouth Africa completely surrounds Lesotho and almost completely surrounds Eswatini

Topic: South Georgia and South Sandwich Islandsthe north coast of South Georgia has several large bays, which provide good anchorage

Topic: South Sudanlandlocked; The Sudd is a vast swamp in the north central region of South Sudan, formed by the White Nile, its size is variable but can reach some 15% of the country's total area during the rainy season; it is one of the world's largest wetlands

Topic: Southern Oceanthe major chokepoint is the Drake Passage between South America and Antarctica; the Polar Front (Antarctic Convergence) is the best natural definition of the northern extent of the Southern Ocean; it is a distinct region at the middle of the Antarctic Circumpolar Current that separates the cold polar surface waters to the south from the warmer waters to the north; the Front and the Current extend entirely around Antarctica, reaching south of 60 degrees south near New Zealand and near 48 degrees south in the far South Atlantic coinciding with the path of the maximum westerly winds

Topic: Spainstrategic location along approaches to Strait of Gibraltar; Spain controls a number of territories in northern Morocco including the enclaves of Ceuta and Melilla, and the islands of Penon de Velez de la Gomera, Penon de Alhucemas, and Islas Chafarinas; Spain's Canary Islands are one of four North Atlantic archipelagos that make up Macaronesia; the others are Azores (Portugal), Madeira (Portugal), and Cabo Verde

Topic: Spratly Islandsstrategically located near several primary shipping lanes in the central South China Sea; includes numerous small islands, atolls, shoals, and coral reefs

Topic: Sri Lankastrategic location near major Indian Ocean sea lanes; Adam's Bridge is a chain of limestone shoals between the southeastern coast of India and the northwestern coast of Sri Lanka; geological evidence suggests that this 50-km long Bridge once connected India and Sri Lanka; ancient records seem to indicate that a foot passage was possible between the two land masses until the 15th century when the land bridge broke up in a cyclone

Topic: Sudanthe Nile is Sudan's primary water source; its major tributaries, the White Nile and the Blue Nile, meet at Khartoum to form the River Nile which flows northward through Egypt to the Mediterranean Sea

Topic: Surinamesmallest independent country on South American continent; mostly tropical rain forest; great diversity of flora and fauna that, for the most part, is increasingly threatened by new development; relatively small population, mostly along the coast

Topic: Svalbardnorthernmost part of the Kingdom of Norway; consists of nine main islands; glaciers and snowfields cover 60% of the total area; Spitsbergen Island is the site of the Svalbard Global Seed Vault, a seed repository established by the Global Crop Diversity Trust and the Norwegian Government

Topic: Swedenstrategic location along Danish Straits linking Baltic and North Seas; Sweden has almost 100,000 lakes, the largest of which, Vanern, is the third largest in Europe

Topic: Switzerlandlandlocked; crossroads of northern and southern Europe; along with southeastern France, northern Italy, and southwestern Austria, has the highest elevations in the Alps

Topic: Syriathe capital of Damascus - located at an oasis fed by the Barada River - is thought to be one of the world's oldest continuously inhabited cities; there are 42 Israeli settlements and civilian land use sites in the Israeli-controlled Golan Heights (2017)

Topic: Taiwanstrategic location adjacent to both the Taiwan Strait and the Luzon Strait

Topic: Tajikistanlandlocked; highest point, Qullai Ismoili Somoni (formerly Communism Peak), was the tallest mountain in the former USSR

Topic: TanzaniaKilimanjaro is the highest point in Africa and one of only three mountain ranges on the continent that has glaciers (the others are Mount Kenya [in Kenya] and the Ruwenzori Mountains [on the Uganda-Democratic Republic of the Congo border]); Tanzania is bordered by three of the largest lakes on the continent: Lake Victoria (the world's second-largest freshwater lake) in the north, Lake Tanganyika (the world's second deepest) in the west, and Lake Nyasa (Lake Malawi) in the southwest

Topic: Thailandcontrols only land route from Asia to Malaysia and Singapore; ideas for the construction of a canal across the Kra Isthmus that would create a bypass to the Strait of Malacca and shorten shipping times around Asia continue to be discussed

Topic: Timor-LesteTimor comes from the Malay word for "east"; the island of Timor is part of the Malay Archipelago and is the largest and easternmost of the Lesser Sunda Islands; the district of Oecussi is an exclave separated from Timor-Leste proper by Indonesia; Timor-Leste has the unique distinction of being the only Asian country located completely in the Southern Hemisphere

Topic: Togothe country's length allows it to stretch through six distinct geographic regions; climate varies from tropical to savanna

Topic: Tokelauconsists of three atolls (Atafu, Fakaofo, Nukunonu), each with a lagoon surrounded by a number of reef-bound islets of varying length and rising to over 3 m above sea level

Topic: Tongathe western islands (making up the Tongan Volcanic Arch) are all of volcanic origin; the eastern islands are nonvolcanic and are composed of coral limestone and sand

Topic: Trinidad and TobagoPitch Lake, on Trinidad's southwestern coast, is the world's largest natural reservoir of asphalt

Topic: Tunisiastrategic location in central Mediterranean; Malta and Tunisia are discussing the commercial exploitation of the continental shelf between their countries, particularly for oil exploration

Topic: Turkeystrategic location controlling the Turkish Straits (Bosporus, Sea of Marmara, Dardanelles) that link the Black and Aegean Seas; the 3% of Turkish territory north of the Straits lies in Europe and goes by the names of European Turkey, Eastern Thrace, or Turkish Thrace; the 97% of the country in Asia is referred to as Anatolia; Istanbul, which straddles the Bosporus, is the only metropolis in the world located on two continents; Mount Ararat, the legendary landing place of Noah's ark, is in the far eastern portion of the country

Topic: Turkmenistanlandlocked; the western and central low-lying desolate portions of the country make up the great Garagum (Kara-Kum) desert, which occupies over 80% of the country; eastern part is plateau

Topic: Turks and Caicos Islandsinclude eight large islands and numerous smaller cays, islets, and reefs; only two of the Caicos Islands and six of the Turks group are inhabited

Topic: Tuvaluone of the smallest and most remote countries on Earth; six of the nine coral atolls - Nanumea, Nui, Vaitupu, Nukufetau, Funafuti, and Nukulaelae - have lagoons open to the ocean; Nanumaya and Niutao have landlocked lagoons; Niulakita does not have a lagoon

Topic: Ugandalandlocked; fertile, well-watered country with many lakes and rivers; Lake Victoria, the world's largest tropical lake and the second largest fresh water lake, is shared among three countries: Kenya, Tanzania, and Uganda

Topic: Ukrainestrategic position at the crossroads between Europe and Asia; second-largest country in Europe after Russia

Topic: United Arab Emiratesstrategic location along southern approaches to Strait of Hormuz, a vital transit point for world crude oil

Topic: United Kingdomlies near vital North Atlantic sea lanes; only 35 km from France and linked by tunnel under the English Channel (the Channel Tunnel or Chunnel); because of heavily indented coastline, no location is more than 125 km from tidal waters

Topic: United Statesnote 1: world's third-largest country by size (after Russia and Canada) and by population (after China and India); Denali (Mt. McKinley) is the highest point (6,190 m) in North America and Death Valley the lowest point (-86 m) on the continent note 2: the western coast of the United States and southern coast of Alaska lie along the Ring of Fire, a belt of active volcanoes and earthquake epicenters bordering the Pacific Ocean; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Fire note 3: the Aleutian Islands are a chain of volcanic islands that divide the Bering Sea (north) from the main Pacific Ocean (south); they extend about 1,800 km westward from the Alaskan Peninsula; the archipelago consists of 14 larger islands, 55 smaller islands, and hundreds of islets; there are 41 active volcanoes on the islands, which together form a large northern section of the Ring of Fire

note 4: Mammoth Cave, in west-central Kentucky, is the world's longest known cave system with more than 650 km (405 miles) of surveyed passageways, which is nearly twice as long as the second-longest cave system, the Sac Actun underwater cave in Mexico - the world's longest underwater cave system (see "Geography - note" under Mexico);

note 5: Kazumura Cave on the island of Hawaii is the world's longest and deepest lava tube cave; it has been surveyed at 66 km (41 mi) long and 1,102 m (3,614 ft) deep

note 6: Bracken Cave outside of San Antonio, Texas is the world's largest bat cave; it is the summer home to the largest colony of bats in the world; an estimated 20 million Mexican free-tailed bats roost in the cave from March to October making it the world's largest known concentration of mammals

note 7: the US is reliant on foreign imports for 100% of its needs for the following strategic resources - Arsenic, Cesium, Fluorspar, Gallium, Graphite, Indium, Manganese, Niobium, Rare Earths, Rubidium, Scandium, Tantalum, Yttrium; see Appendix H: Strategic Materials for further details

note 8: three food crops are generally acknowledged to be native to areas of what is now the United States: cranberries, pecans, and sunflowersnote 1: world's third-largest country by size (after Russia and Canada) and by population (after China and India); Denali (Mt. McKinley) is the highest point (6,190 m) in North America and Death Valley the lowest point (-86 m) on the continentnote 2: the western coast of the United States and southern coast of Alaska lie along the Ring of Fire, a belt of active volcanoes and earthquake epicenters bordering the Pacific Ocean; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Firenote 3: the Aleutian Islands are a chain of volcanic islands that divide the Bering Sea (north) from the main Pacific Ocean (south); they extend about 1,800 km westward from the Alaskan Peninsula; the archipelago consists of 14 larger islands, 55 smaller islands, and hundreds of islets; there are 41 active volcanoes on the islands, which together form a large northern section of the Ring of Fire

note 4: Mammoth Cave, in west-central Kentucky, is the world's longest known cave system with more than 650 km (405 miles) of surveyed passageways, which is nearly twice as long as the second-longest cave system, the Sac Actun underwater cave in Mexico - the world's longest underwater cave system (see "Geography - note" under Mexico);

note 5: Kazumura Cave on the island of Hawaii is the world's longest and deepest lava tube cave; it has been surveyed at 66 km (41 mi) long and 1,102 m (3,614 ft) deep

note 6: Bracken Cave outside of San Antonio, Texas is the world's largest bat cave; it is the summer home to the largest colony of bats in the world; an estimated 20 million Mexican free-tailed bats roost in the cave from March to October making it the world's largest known concentration of mammals

note 7: the US is reliant on foreign imports for 100% of its needs for the following strategic resources - Arsenic, Cesium, Fluorspar, Gallium, Graphite, Indium, Manganese, Niobium, Rare Earths, Rubidium, Scandium, Tantalum, Yttrium; see Appendix H: Strategic Materials for further details

note 8: three food crops are generally acknowledged to be native to areas of what is now the United States: cranberries, pecans, and sunflowers

Topic: United States Pacific Island Wildlife RefugesBaker, Howland, and Jarvis Islands: scattered vegetation consisting of grasses, prostrate vines, and low growing shrubs; primarily a nesting, roosting, and foraging habitat for seabirds, shorebirds, and marine wildlife; closed to the public; Johnston Atoll: Johnston Island and Sand Island are natural islands, which have been expanded by coral dredging; North Island (Akau) and East Island (Hikina) are manmade islands formed from coral dredging; the egg-shaped reef is 34 km in circumference; closed to the public; Kingman Reef: barren coral atoll with deep interior lagoon; closed to the public; Midway Islands: a coral atoll managed as a National Wildlife Refuge and open to the public for wildlife-related recreation in the form of wildlife observation and photography; Palmyra Atoll: the high rainfall and resulting lush vegetation make the environment of this atoll unique among the US Pacific Island territories; supports a large undisturbed stand of Pisonia beach forestBaker, Howland, and Jarvis Islands: scattered vegetation consisting of grasses, prostrate vines, and low growing shrubs; primarily a nesting, roosting, and foraging habitat for seabirds, shorebirds, and marine wildlife; closed to the public; Johnston Atoll: Johnston Island and Sand Island are natural islands, which have been expanded by coral dredging; North Island (Akau) and East Island (Hikina) are manmade islands formed from coral dredging; the egg-shaped reef is 34 km in circumference; closed to the public; Kingman Reef: barren coral atoll with deep interior lagoon; closed to the public; Midway Islands: a coral atoll managed as a National Wildlife Refuge and open to the public for wildlife-related recreation in the form of wildlife observation and photography; Palmyra Atoll: the high rainfall and resulting lush vegetation make the environment of this atoll unique among the US Pacific Island territories; supports a large undisturbed stand of Pisonia beach forest

Topic: Uruguaysecond-smallest South American country (after Suriname); most of the low-lying landscape (three-quarters of the country) is grassland, ideal for cattle and sheep raising

Topic: Uzbekistanalong with Liechtenstein, one of the only two doubly landlocked countries in the world

Topic: Vanuatua Y-shaped chain of four main islands and 80 smaller islands; several of the islands have active volcanoes and there are several underwater volcanoes as well

Topic: Venezuelanote 1: the country lies on major sea and air routes linking North and South America note 2: Venezuela has some of the most unique geology in the world; tepuis are massive table-top mountains of the western Guiana Highlands that tend to be isolated and thus support unique endemic plant and animal species; their sheer cliffsides account for some of the most spectacular waterfalls in the world including Angel Falls, the world's highest (979 m) that drops off Auyan Tepuinote 1: the country lies on major sea and air routes linking North and South Americanote 2: Venezuela has some of the most unique geology in the world; tepuis are massive table-top mountains of the western Guiana Highlands that tend to be isolated and thus support unique endemic plant and animal species; their sheer cliffsides account for some of the most spectacular waterfalls in the world including Angel Falls, the world's highest (979 m) that drops off Auyan Tepui

Topic: Vietnamnote 1: extending 1,650 km north to south, the country is only 50 km across at its narrowest point

note 2: Son Doong in Phong Nha-Ke Bang National Park is the world's largest cave (greatest cross sectional area) and is the largest known cave passage in the world by volume; it currently measures a total of 38.5 million cu m (about 1.35 billion cu ft); it connects to Thung cave (but not yet officially); when recognized, it will add an additional 1.6 million cu m in volume; Son Doong is so massive that it contains its own jungle, underground river, and localized weather system; clouds form inside the cave and spew out from its exits and two dolines (openings (sinkhole skylights) created by collapsed ceilings that allow sunlight to stream in)

Topic: Virgin Islandsimportant location along the Anegada Passage - a key shipping lane for the Panama Canal; Saint Thomas has one of the best natural deepwater harbors in the Caribbean

Topic: Wake Islandstrategic location in the North Pacific Ocean; emergency landing location for transpacific flights

Topic: Wallis and Futunaboth island groups have fringing reefs; Wallis contains several prominent crater lakes

Topic: West Banklandlocked; highlands are main recharge area for Israel's coastal aquifers; there are about 380 Israeli civilian sites, including about 213 settlements and 132 small outpost communities in the West Bank and 35 sites in East Jerusalem (2017)

Topic: Worldnote 1: the world is now thought to be about 4.55 billion years old, just about one-third of the 13.8-billion-year age estimated for the universe; the earliest widely accepted date for life appearing on earth is 3.48 billion years ago, but this date is conservative and may get pushed back further note 2: although earthquakes can strike anywhere at any time, the vast majority occur in three large zones of the earth; the world's greatest earthquake belt, the Circum-Pacific Belt (popularly referred to as the Ring of Fire), is the zone of active volcanoes and earthquake epicenters bordering the Pacific Ocean; about 90% of the world's earthquakes (81% of the largest earthquakes) and some 75% of the world's volcanoes occur within the Ring of Fire; the belt extends northward from Chile, along the South American coast, through Central America, Mexico, the western US, southern Alaska and the Aleutian Islands, to Japan, the Philippines, Papua New Guinea, island groups in the southwestern Pacific, and New Zealand

the second prominent belt, the Alpide, extends from Java to Sumatra, northward along the mountains of Burma, then eastward through the Himalayas, the Mediterranean, and out into the Atlantic Ocean; it accounts for about 17% of the world's largest earthquakes; the third important belt follows the long Mid-Atlantic Ridge

note 3: information on the origin sites for many of the world's major food crops may be found in the "Geography - note" for the following countries: Argentina, Bolivia, Brazil, China, Ecuador, Ethiopia, Indonesia, Mexico, Papua New Guinea, Paraguay, Peru, and the United Statesnote 1: the world is now thought to be about 4.55 billion years old, just about one-third of the 13.8-billion-year age estimated for the universe; the earliest widely accepted date for life appearing on earth is 3.48 billion years ago, but this date is conservative and may get pushed back furthernote 2: although earthquakes can strike anywhere at any time, the vast majority occur in three large zones of the earth; the world's greatest earthquake belt, the Circum-Pacific Belt (popularly referred to as the Ring of Fire), is the zone of active volcanoes and earthquake epicenters bordering the Pacific Ocean; about 90% of the world's earthquakes (81% of the largest earthquakes) and some 75% of the world's volcanoes occur within the Ring of Fire; the belt extends northward from Chile, along the South American coast, through Central America, Mexico, the western US, southern Alaska and the Aleutian Islands, to Japan, the Philippines, Papua New Guinea, island groups in the southwestern Pacific, and New Zealand

the second prominent belt, the Alpide, extends from Java to Sumatra, northward along the mountains of Burma, then eastward through the Himalayas, the Mediterranean, and out into the Atlantic Ocean; it accounts for about 17% of the world's largest earthquakes; the third important belt follows the long Mid-Atlantic Ridge

note 3: information on the origin sites for many of the world's major food crops may be found in the "Geography - note" for the following countries: Argentina, Bolivia, Brazil, China, Ecuador, Ethiopia, Indonesia, Mexico, Papua New Guinea, Paraguay, Peru, and the United States

Topic: Yemenstrategic location on Bab el Mandeb, the strait linking the Red Sea and the Gulf of Aden, one of world's most active shipping lanes

Topic: Zambialandlocked; the Zambezi forms a natural riverine boundary with Zimbabwe; Lake Kariba on the Zambia-Zimbabwe border forms the world's largest reservoir by volume (180 cu km; 43 cu mi)

Topic: Zimbabwelandlocked; the Zambezi forms a natural riverine boundary with Zambia; in full flood (February-April) the massive Victoria Falls on the river forms the world's largest curtain of falling water; Lake Kariba on the Zambia-Zimbabwe border forms the world's largest reservoir by volume (180 cu km; 43 cu mi)