Venezuela (locally: [βeneˈswela]), officially called the Bolivarian Republic of Venezuela (Spanish: República Bolivariana de Venezuela [repuˈβlika βoliβaˈɾjana ðe βeneˈswela]), is a tropical country on the northern coast of South America. It borders Colombia to the west, Guyana to the east, and Brazil to the south. Its northern coastline of roughly 2,800 kilometres (1,700 mi) includes numerous islands in the Caribbean Sea, and in the north east borders the northern Atlantic Ocean. Caribbean islands such as Trinidad and Tobago, Grenada, Curaçao, Bonaire, Aruba and the Leeward Antilles lie near the Venezuelan coast. Venezuela's territory covers around 916,445 square kilometres (353,841 sq mi) with an estimated population of 29,105,632. Venezuela is considered a state with extremely high biodiversity, with habitats ranging from the Andes mountains in the west to the Amazon Basin rainforest in the south, via extensive llanos plains and Caribbean coast in the center and the Orinoco River Delta in the east.