Editor

Salar de Uyuni — an arid, windswept salt flat in southwestern Bolivia — is considered one of the most extreme and remarkable vistas on earth. Part of the Altiplano, the Salar serves as the major transport route across the Bolivian Altiplano and is a major breeding ground for several species of flamingos.

The Sierra Nevada de Santa Marta is an isolated mountain range separated from the Andes chain that runs through Colombia. Just 26 miles from the Caribbean coast, it is one of the world's highest coastal ranges, culminating in the snowcapped Cristóbal Colón, the highest peak in Colombia.

Ciudad Perdida is an ancient Tayrona indigenous town and archaeological site carved into the mountainside in Colombia's Sierra Nevada de Santa Marta isolated mountain range. It is believed to have been founded about 800 CE, some 650 years earlier than Machu Picchu.

Mount Roraima is the highest of the Pakaraima chain of tepui plateaus in South America. Its summit area is bounded on all sides by cliffs and serves as the tripoint of Venezuela, Guyana and Brazil. The tabletop mountains of Roraima are considered to be the oldest geological formations on Earth.

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 Sierra Madre is a mountain system that is part of the American Cordillera, a chain of mountain ranges 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.