Salar de Uyuni (Spanish Salar de Uyuni) - a dried-up salt lake in the south of the desert plain in the Bolivian Altiplano, at an altitude of 3,650 m above sea level. 10 582 sq km area has and is the largest salt marsh in the world. The main minerals - halite and gypsum. The inner part is covered with a layer of salt thickness of 2.8 m. During the rainy season, salt marsh is covered with a thin layer of water and is transformed into the world's largest mirror surface. About 40 thousand years ago this area was part of Lake Minchin (itself detached from the ancient lake Ballivyan).
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