Venezuela, officially the Bolivarian Republic of Venezuela (República Bolivariana de Venezuela), is a country on the northern coast of South America, consisting of a continental landmass and a large number of small islands and islets in the Caribbean Sea. The capital and largest urban agglomeration is the city of Caracas. It has a territorial extension of 916,445 km 2 (353,841 sq mi). The continental territory is bordered on the north by the Caribbean Sea and the Atlantic Ocean, on the west by Colombia, Brazil on the south, Trinidad and Tobago to the north-east and on the east by Guyana. With this last country, the Venezuelan government maintains a claim for Guayana Esequiba over an area of 159,542 km 2 (61,600 sq mi). For its maritime areas, it exercises sovereignty over 71,295 km 2 (27,527 sq mi) of territorial waters, 22,224 km 2 (8,581 sq mi) in its contiguous zone, 471,507 km 2 (182,050 sq mi) of the Caribbean Sea and the Atlantic Ocean under the concept of exclusive economic zone, and 99,889 km 2 (38,567 sq mi) of continental shelf. This marine area borders those of 13 states. The country has extremely high biodiversity and is ranked seventh in the world's list of nations with the most number of species. There are habitats ranging from the Andes Mountains in the west to the Amazon basin rain-forest in the south via extensive llanos plains, the Caribbean coast and the Orinoco River Delta in the east.
The territory now known as Venezuela was colonized by Spain in 1522 amid resistance from indigenous peoples. In 1811, it became one of the first Spanish-American territories to declare independence, which was not securely established until 1821, when Venezuela was a department of the federal republic of Gran Colombia. It gained full independence as a country in 1830. During the 19th century, Venezuela suffered political turmoil and autocracy, remaining dominated by regional caudillos (military strongmen) until the mid-20th century. Since 1958, the country has had a series of democratic governments. Economic shocks in the 1980s and 1990s led to several political crises, including the deadly Caracazo riots of 1989, two attempted coups in 1992, and the impeachment of President Carlos Andrés Pérez for embezzlement of public funds in 1993. A collapse in confidence in the existing parties saw the 1998 election of former coup-involved career officer Hugo Chávez and the launch of the Bolivarian Revolution. The revolution began with a 1999 Constituent Assembly, where a new Constitution of Venezuela was written. This new constitution officially changed the name of the country to Bolivarian Republic of Venezuela (República Bolivariana de Venezuela).