Salar de Uyuni, located in southwest Bolivia, is the world’s largest salt flat. At 3,656 meters above sea level, the flat spreads a huge 10,582 square kilometers (4,086 sq mi), across the landscape. 30,000–42,000 years ago, the area was part of a giant prehistoric lake, Lake Minchin. When it dried, two lakes and two major salt deserts, Salar de Coipasa and the larger Salar de Uyuni, were formed.
Famed for its magnitude, Salar de Uyuni is also a major breeding ground for flamingos and houses 50 – 70% of the world’s lithium reserves. But the salt flat is also renowned for another incredible feature. When it rains, the salty crust transforms into a giant mirror.
Featured image of Salar de Uyuni, Bolivia. Photo: Luca Galuzzi (www.galuzzi.it)