Question: Lake Managua and Rush Lake, are an expanse of water entirely surrounded by land and unconnected to the sea?

full_context: Document 1: Managua Department: Managua (] ) is a department in Nicaragua. It covers an area of 3,672 km² and has a population of 1,380,300 (2005 census), making it the country's most populated department. The capital is the city of Managua, which is also the capital of Nicaragua. The department has two coastlines, on the Pacific Ocean and on Lake Managua, but does not border Lake Nicaragua.
Document 2: Lake Ilopango: Lake Ilopango is a crater lake which fills a scenic 8 by 11 km (72 km or 28 sq mi) volcanic caldera in central El Salvador, on the borders of the San Salvador, La Paz, and Cuscatlán departments. The caldera, which contains the second largest lake in the country and is immediately east of the capital city, San Salvador, has a scalloped 100 m to 500 m high rim. Any surplus drains via the Jiboa River to the Pacific Ocean. The lake is known for being a possible source for the extreme weather events of 535–536. The local military airbase, Ilopango International Airport, has annual airshows where international pilots from all over the world fly over San Salvador City and Ilopango lake.
Document 3: Lake Nicaragua: Lake Nicaragua or Cocibolca or Granada (Spanish: "Lago de Nicaragua" , "Lago Cocibolca, Mar Dulce, Gran Lago, Gran Lago Dulce," or "Lago de Granada") is a freshwater lake in Nicaragua. Of tectonic origin and with an area of 8264 km2 , it is the largest lake in Central America, the 19th largest lake in the world (by area) and the 9th largest in the Americas, slightly smaller than Lake Titicaca. With an elevation of 32.7 m above sea level, the lake reaches a depth of 26 m . It is intermittently joined by the Tipitapa River to Lake Managua.
Document 4: Los Placeres: Los Placeres is an archeological site located between the “Waspán” and “Tabacalera Nicaragüense” neighborhoods at kilometer 4½ of the “Carretera Norte”, in Managua, en Nicaragua. The site extends to the coast of Lake Managua. A large part of the area that delimits the site is being impacted by a new urban settlement known as Barrio Hugo Chávez, which divides the site, where its new settlers have disturbed the ground for installation of pipes for drinking water, toilet and housing, this activity has caused a serious incidental findings and impacts to the prehispanic archaeological site.
Document 5: Kutwal Lake: Kutwal Lake is a high altitude lake located in the Haramosh valley of Gilgit district, in Gilgit-Baltistan. The valley of Haramosh is about 60 miles away from the capital Gilgit, in the east. The lake is surrounded by several high mountains that include Haramosh Peak, Laila Peak and Dobani Peak.
Document 6: Pari Lake: Pari Lake is located at the highest altitude approx: 14,442 ft above sea level, in the mountain ranges of Utror Valley, Kalam, Swat Valley, Khyber Pakhtunkhwa, Pakistan. It is comparatively greater in size and depth than the other lake situated in its vicinity and remains open in the months of July till September. The western face of the lake is open and its water flows down to the gigantic Kundol Lake which is situated in the foothills.
Document 7: Rush Peak: Rush Peak is a mountain in the Karakoram mountain range of Central Asia. It is located in the Nagar District of Gilgit-Baltistan, Pakistan. While not a high peak by local standards, it is noteworthy as a remote trekking destination. It can be reached via Nagar Valley and Hoper Village. The peak can be accessed via Hoper Glacier (Bualtar Glacier) and Barpu Glacier. The peak is relatively easy to climb in the summer months and ascents have been made by amateur climbers without proper mountaineering gear. In winter, access to the mountain is made difficult by heavy snows. The top of the peak provides stunning views of Miar Peak (6,824 m), Miar Glacier and Phuparash Peak (6,574 m). On a clear day, one can look east and see some of the world's highest mountains, including K2 and Broad Peak. At the mountain's base lies one of the world's highest alpine lakes, Rush Lake (4,694m).
Document 8: Burji La: Burji La (or Burji Pass) is a natural pass in mountains between Skardu and Deosai National Park in Gilgit Baltistan, Pakistan. Its elevation is 4816 meters. It is famous especially for its beautiful panoramic view of so many mountain peaks, including that of K2, Nanga Parbat, Masherbrum, Chogolisa, Laila Peak, Golden Peak, Gasherbrum I, Gasherbrum II, Gasherbrum IV and a part of Broad Peak mountain.
Document 9: Tipitapa River: The Tipitapa River (Río Tipitapa) is a short river in Nicaragua that connects Lake Managua to Lake Nicaragua. Its flow is seasonally variable and when Lake Managua, which is situated about ten meters higher than Lake Nicaragua, experiences high water levels (usually in the rainy season), the waters of the Tipitapa can rise, resulting in floods that affect bordering towns such as Tipitapa, which is situated on the river, near Lake Managua.
Document 10: Lake Managua: Lake Managua (] ) (also known as Lake Xolotlán) (located at ) is a lake in Nicaragua. The Spanish name is Lago de Managua or Lago Xolotlán. At 1,042 km², it is approximately 65 km long and 25 km wide. Similarly to the name of Lake Nicaragua, its name was coined by the Spanish conquerors from "Mangue" (their name for the Mánkeme tribes) and "agua" ("water"). The city of Managua, the capital of Nicaragua, lies on its southwestern shore.
Document 11: San Juan River (Nicaragua): The San Juan (Spanish: "Río San Juan"), also known as El Desaguadero ("the drain"), is a 192 km river that flows east out of Lake Nicaragua into the Caribbean Sea. A large section of the border between Nicaragua and Costa Rica runs on the right (southern) bank of the river. It was part, with the lake, of a proposed route for a Nicaragua Canal in the 19th century. The idea of the project has been revived in the last decade, including the possibility of other routes within the country. The Ecocanal project has obtained a Concession from the National Assembly of Nicaragua to re-open the San Juan River to commercial barge traffic.
Document 12: Nako Lake: Nako Lake is a high altitude lake in the Pooh sub-division of the Kinnaur district. It forms part of the boundary of Nako village and seems that the village is half buried in the lake's border. It is about 3662 m above sea level. The lake is surrounded by willow and poplar trees. Near the lake there are four Buddhist temples. Near this place there is a footlike impression ascribed to the saint Padmasambhava. Several miles away there is a village called Tashigang around which there are several caves where it is believed that Guru Padmasambhava meditated and gave discourse to followers. There is a waterfall nearby which has snow water falling like a river of milk. Legend says that it is a heavenly realm of fairies. In one of the caves you are still able to see the live footprints of these fairies or other demigods. It is a sacred place for the people of these valleys. Followers come from as far a place as Ladhak and spiti valley.
Document 13: La Chureca: La Chureca (Spanish slang word for "city dump") was the municipal domestic and industrial waste-disposal site in Managua, Nicaragua. It was the largest open-air landfill in Central America, covering 7 km in the north-western corner of Managua. It is now covered and sealed, it is a modern waste dispose system which is located on the south shore of Lake Managua and it is near Acahualinca, home to the famous ancient footprints of Acahualinca. Out of the approximately 1,000 persons who reside at the dump, 50% are children under age 18. These children and families work at La Chureca sorting through the waste. Approximately 400 to 440 families live in La Chureca.
Document 14: Lupghar Sar: Lupghar Sar is 109th on the list of world tallest mountains. It is located in Shishkat valley of Hunza Gojal. It is part of the Momhail Sar cluster of mountains and has an elevation of 7200 m above sea level. In Wakhi language Lupghar Sar translates as "the top of the big rock".
Document 15: Rush Lake (Pakistan): Rush Lake is a high altitude lake located in Nagar Valley, Gilgit-Baltistan, Pakistan near Rush Pari Peak, 5098 m . At 4,694 meters, Rush is one of the highest alpine lakes in the world. It is located about 15 km north of Miar Peak and Spantik (Golden Peak), which are in the Nagar valley. Rush Lake and Rush Peak can be reached via Nagar and Hopar and via the Hopar Glacier (Bualtar Glacier) and Miar Glacier, which rises from Miar and Phuparash peaks. The trek to Rush Lake provides spectacular views of Spantik, Malubiting, Miar Peak, Phuparash Peak and Ultar Sar.
ground_truth: yes