What is the name of the large salt flat in Bolivia that becomes a mirror after rain?

Salar de Uyuni is the large Bolivian salt flat that can become a mirror after rain.

Located in southwestern Bolivia near the crest of the Andes, Salar de Uyuni covers roughly 10,000 square kilometers, making it the world’s largest salt flat. It formed from the transformation of several prehistoric lakes, including Lake Minchin and Lake Tauca. When seasonal rain leaves a thin layer of water on the exceptionally flat surface, the sky can be reflected almost perfectly.

The salt crust contains polygonal patterns created as brine evaporates. Beneath it lies a major reserve of lithium-rich brine, an important resource for rechargeable-battery production. Extraction is technically and environmentally complex because the salt flat is also a fragile high-altitude ecosystem.

Salar de Uyuni is more than a scenic attraction: it is used for satellite radar calibration because its broad surface is unusually level. The nearby Isla Incahuasi is known for giant cacti and fossilized coral-like structures, showing that the region was once covered by water.