Guyana is the only nation state of the Commonwealth of Nations located on the mainland of South America. It is bordered to the east by Suriname, to the south and southwest by Brazil and to the west by Venezuela. It is the fourth-smallest country on the mainland of South America (after Suriname, French Guiana, and Uruguay.
Guyana is one of the four non-Spanish-speaking territories on the continent, along with the countries of Brazil, Suriname and the French overseas region of French Guiana. Culturally, Guyana associates primarily with the English-speaking Caribbean countries such as Jamaica, or Trinidad and Tobago.
Guyana can be divided into four natural regions: a narrow and fertile marshy plain along the Atlantic (low coastal plain) coast where most of the population lives, then a white sand belt more inland (hilly sand and clay region), containing most of Guyana's mineral deposits, the dense rainforests (Forested Highland Region) across the middle of the country, the grassy flat savannah in the south and finally the larger interior highlands (interior savannah) consisting mostly of mountains that gradually rise to the Brazilian border.