Lake Poopó is a large saline lake located in a shallow depression in the Altiplano Mountains in Bolivia. Here, sediments in the long, wide lake cause its waters to change in color from dark brown to the north to green to the south.
Two large, bright white salt flats can be seen south of the lake. The larger of the two, the Salar de Uyuni, is actually the world’s biggest salt flat at 10,582 square kilometers (4,086 sq mi).
The second is Lago Coipasa or Salar de Coipasa, 20 km north of Salar de Uyuni. Its surface area is 806 km². Its eastern shores are lightly tinged with blue.