The Andes Mountains are the longest continental mountain range in the world. They form a continuous highland along the western coast of South America. The Andean Region extends north-south from Caribbean Venezuela through the Atacama Desert to cold, windy, wet Cape Horn.
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The Altiplano is a high plateau region in west-central South America where the Andes are the widest. The bulk of the Altiplano-Puna plateau lies in Bolivia, its northern parts lie in Peru, and its southern parts lie in Chile and Argentina. The Altiplano Basin is a sedimentary basin located on the plateau.
The Altiplano-Puna volcanic complex is a major caldera and volcanic field located in the southern Altiplano-Puna plateau in the central Andes, including parts of Argentina, Bolivia, and Chile. It includes two active geothermal areas: Tatio and Sol de Manana.
The Andean Patagonian Forest spreads over steep elevations along a thin strip on both sides of the Andes Mountains in southern South America. These temperate forests in southern Chile and Argentina are the southernmost forests on earth.
The Andino Norpatagónica Biosphere Reserve is located in Argentina's northwestern Patagonia. It comprises five National Parks and numerous other protected areas. The landscape is primarily mountainous, dominated by the Andes in the west, with sub-Andean plains and plateaus in the east.
The Atacama Plateau, also known as the Puna de Atacama, is an arid high plateau in the Andes of northwestern Argentina, extending into Chile. This cold, desolate Andean tableland can be defined as the southernmost portion of the Andean Altiplano.
The Atlantic Forest, or Mata Atlântica, runs along the coast of eastern and southeastern Brazil, stretching inland into Argentina and Paraguay. Although only a very small part of the original forests remain, it is still one of the most diverse ecosystems on the planet.
Calilegua is the largest national park in the Argentine Northwest, covering a biologically diverse environment. It is also the largest protected area in Argentina dedicated to conserving subtropical evergreen mountain rainforests known as Southern Andean Yungas.
Cape Horn is the southernmost headland of Chile's portion of the Tierra del Fuego archipelago. The Diego Ramírez Islands are a small group of islands located southwest of Cape Horn. The Drake Passage is the body of water between Cape Horn and the South Shetland Islands of Antarctica.
The Chilean Andes and Argentine Andes form most of the border between Chile and Argentina, making up the highest section of the Andes range. The Dry Andes, Wet Andes, Patagonian Andes and Fuegian Andes are climatic and glaciological subdivisions.
Ushuaia, situated on the southern coast of Isla Grande de Tierra del Fuego at the tip of South America, claims the title of the southernmost city in Argentina and the world. It is the capital of Tierra del Fuego Province, Argentina's southernmost and least populous.