Editor

The Sonoran Desert, also called Desierto de Altar, is an arid region covering 120,000 sq mi. This North American desert ecoregion covers large parts of northwestern Mexico in Sonora, Baja California and Baja California Sur, as well as parts of the southwestern U.S. It is Mexico's hottest desert.

The Chihuahuan Desert is the largest desert in North America, stretching all the way from the southwestern United States deep into the Central Mexican Highlands. This sheltered desert ecoregion is unique, encompassing one of the most biologically diverse arid regions on Earth.

The Sierra Madre is a mountain system that is part of the American Cordillera, a chain of mountain ranges (cordillera) that consists of an almost continuous sequence of ranges. These mountain ranges form the western 'backbone' of North America, Central America, South America and West Antarctica.

The Baja California Peninsula is a peninsula in northwestern Mexico. It is bounded to the north by the United States, to the east by the Gulf of California, and to the south and west by the Pacific Ocean. The peninsula is separated from mainland Mexico by the Gulf of California and the Colorado River.

The Isthmus of Tehuantepec is an isthmus in southern Mexico between the Gulf of Mexico and the Pacific Ocean. It represents the shortest distance between the Gulf of Mexico and the Pacific Ocean. The isthmus is connected to Veracruz, Mexico City, and the Guatemalan border by rail.

Cape Horn is the southernmost headland of the Tierra del Fuego archipelago of southern Chile.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 Strait of Magellan is a sea route in southern Chile separating mainland South America to the north and Tierra del Fuego Archipelago to the south. The archipelago is divided by Chile and Argentina and is further separated by the east-west Beagle Channel, immediately south of the main island.