Salar de Uyuni is located amid the Andes in southwest Bolivia. It once was a huge lake, but since it went dry it is now the world's largest salt flat. Its size is remarkable at 10,582 square kilometers which is 4,086 square miles. Many people that live around that area speak spanish, but you will find a lot of tourists who speak different languages because of how big of an attraction it is. The currency is much different from the United States, 1 Boliviano equals .14 US dollar. The city outside of the huge attraction, Uyuni, has population of around 10,500 people. The ethnicities of the people there are Quechua and Aymara. The formation of Salar de Uyuni other than the lake going dry, was because of an uplift of the Andes Mountains.