Uyuni, Bolivia Located in Southwestern Bolivia, Salar de Uyuni is the largest salt flat in the world at 4,085 square miles. The flats were once part of a large lake more than 40,000 years ago.

Uyuni, Bolivia The Bolivian salt flats are a 4,085 square mile (10582 square km) bright white expanse. In the summer though it rains enough that they are covered in water, sometimes more than a meter. It makes for an incredible reflection.