Bolivia is home to the Salar de Uyuni, the world's largest salt flat, spanning over 10,000 square kilometers. Located in the Altiplano near the Andes, it was formed as a result of transformations between several prehistoric lakes. The salt crust is exceptionally flat, varying in height by less than one meter over the entire area. During the rainy season, a thin layer of water covers the salt, transforming it into the world's largest natural mirror, which reflects the sky so perfectly that the horizon disappears. This phenomenon is so distinct that NASA uses the area to calibrate satellite altimeters. Beneath the salt crust lies a massive pool of brine, which contains 50% to 70% of the world's known lithium reserves—a critical component for electric vehicle batteries. The nearby 'Administrative Capital' of La Paz is also part of this high-altitude landscape, connected to the rest of the Altiplano via the world's highest and longest urban cable car system.