ウユニ
Salar de Uyuni is the world's largest salt flat at . It is located in the Potosí and Oruro departments in southwest Bolivia, near the crest of the Andes at an altitude of 3,656 meters (11,995 feet). Salar de Uyuni has long attracted tourists, who came great distances and needed a place to rest before returning to their cities. Building such a resting place required construction materials, which are scarce in the area. Therefore, it was logical to erect a hotel made of salt, which is in ready supply at Salar de Uyuni.