Salar de Uyuni Salar de Uyuni or Salar de Tunupa is the world's largest salt flat at 10,582 square kilometers (4 086 sq mi).It’s located in the Daniel Campos Province in Potosi, southwest Bolivia, near the Andes crest with an elevation of 11,995 feet (3,656 m) above sea level. salar de uyuni in Bolivia Lithium deposit it's buried under all that salt. One of the most popular attractions in Salar de Uyuni is a cemetery for trains. Salar means “salt flat” in Spanish and Uyuni comes from the Aymara language which means “pen” or “enclosure”. Meaning Salar de Uyuni can be translated to “The Salt Falt of Uyuni.” There is also a city name Uyuni that many tourist pass through when visiting the Salar. It contains all ...