Salar de Uyuni (Spanish. Salar de Uyuni) - a dried-up salt lake in the south of the desert plains of the Altiplano in Bolivia, at an altitude of 3650 meters above sea level. It has an area of 10582 square kilometers and is the largest saline in the world. The main minerals - halite and gypsum. The inner part is covered with a layer of salt thickness of 2-8 meters. During the rainy season is covered with a thin layer of saline water and is transformed into the world's largest mirror surface.
About 40 thousand. Years ago, this area was part of Lake Minchin (which itself stood out from an ancient lake Ballivyan). After drying it remains two currently existing lakes Poopo and Uru Uru, and two major salt marsh: the Salar de Uyuni and Koypasa. Uyuni area of approximately 25 times the area of the dry lake Bonneville in the US.
In the midst of endless space it seems like the mirror was on another planet, or was the end of the world.