The Guianas (; ; ) are a region in northeastern South America along the Atlantic coast, divided in several territories and independent countries.

Geography 
The Guianas are on the Guiana Shield, a Precambrian geological formation that is limited to the south and to the east by Brazil, to the west by Venezuela and to the north by the Atlantic Ocean.

The Guianas includes the following three territories, from west to east:
 Guyana, an independent country;
 Suriname, also an independent country; and
 French Guiana, an overseas department of France.

Two other territories are sometimes added:
 The Guayana Region, formerly the Guayana Province, in southeast Venezuela (Spanish Guyana)
 Portuguese Guiana (Brazilian Guiana), in northeastern Brazil, originally part of the Portuguese Empire, now corresponding to the Brazilian State of Amapá.

History 
The territories of the Guianas were made colonies from the 17th century by England, Netherlands, France, Portugal and Spain, resulting in its present division. The colonies were then:
 British Guiana, independent since 1966 with the name of Guyana;
 Spanish Guiana, the present southeastern Venezuela;
 French Guiana or Guyane, an overseas region and department of France;
 Dutch Guiana, independent since 1975 with the name of Suriname;
 Portuguese Guiana, later the Brazilian Guiana and now the Brazilian state of Amapá.

Countries

Guyana 

Guyana (officially the Co-operative Republic of Guyana) is bordered by the Atlantic Ocean to the north, Brazil to the south and southwest, Suriname to the east and Venezuela to the west. It has an area of  with a population of 735,909 (estimate for July 2016). The population density is of  inhabitants/km2. The official language is English.

The largest cities (2012 census) are: Georgetown (118,363 inhabitants), Linden (27,277 inhabitants) and New Amsterdam (17,329 inhabitants).

The highest point is Mount Roraima () at  high. It is in the Pacaraima Mountains, a mountain range in the southwest of the country.

The largest river of the country is the Essequibo river; it starts in the Acarai Mountains and flows to the north for  into the Atlantic Ocean at  from Georgetown, the capital city of Guyana.

Suriname 

Suriname (officially the Republic of Suriname, ) is bordered by the Atlantic Ocean to the north, French Guiana to the east, Guyana to the west and Brazil to the south.  It has an area of  with a population of 585,824 (estimate for July 2016). The population density is of  inhabitants/km2. The official language is Dutch.

The largest cities (2012 census) are: Paramaribo (240,924 inhabitants), Koewarasan (27,713 inhabitants) and De Nieuwe Grond (26,161 inhabitants).

The highest point is Julianatop () at  high. It is in the Sipaliwini District in the center of the country.

The largest river of the country is the Courantyne river; it starts in the Acarai Mountains and flows to the north for about  into the Atlantic Ocean between Guyana and Suriname.

French Guiana 

French Guiana () is an overseas department and region of France. It is bordered by Surinam to the west, Brazil to the south and east, and the Atlantic Ocean to the north.  It has an area of , with a population of 252,338. The population density is of  inhabitants/km2. The official language is French.

The largest cities (2014) are: Cayenne (55,817 inhabitants), Saint-Laurent-du-Maroni (44,169 inhabitants) and Matoury (31,934 inhabitants).

The highest point is Bellevue de l'Inini () at  high.

The main rivers of the French Guiana are:

 The Maroni () river that forms the border between French Guiana and Suriname; it starts in the Tumuk Humak Mountains and is  long.
 The Mana river,  long.
 The Oyapock river (; ) that forms the border betweeen French Guiana and Brazil; it is  long.

References

Other websites 
 Conceptualisation and History of the Guianas

Regions of South America
Guyana
Suriname
French Guiana