One of Bolivia's most spectacular sites, the Salar de Uyuni is the world's highest salt flat, at 3,650 meters (11,975 feet) above sea level, and also the largest, at 10,582 square km (4086 square mi). Once part of a prehistoric salt lake covering most of southwestern Bolivia, it still extends through much of the departments of Potosí and Oruro. As well as the vast expanse of salt, you'll find a series of eerie, translucent lagoons tinted green and red due to high copper
and sulfur contents. Living on the lagoons are flamingos (also tinted green and red), rheas, vicuñas, and foxes. Driving across the salt flat, whether in the dry or rainy season, is a unique experience.