An curved arrow pointing right. At a staggering 4,086 square miles, Bolivia's Salar de Uyuni is the biggest salt flat in the world. During the rainy season, it essentially turns into a giant mirror.

Salar de Uyuni is thought to have once been a prehistoric lake ... Bolivian hotel. No really, that's a strictly enforced rule at the 30-room Hotel Palacio de Sal, which is made entirely of salt.

Neither nation wants to see its salt lake go the way of Poopó. Bolivia's high plain, the Altiplano, unfurls like a leaf-shaped plateau wedged into an unusual place where South America’s Andes ...

including Lake Minchin, which once covered the area, started to evaporate. Over thousands of years, as these lakes dried up, ...