Astronaut Alex Gerst captured from ISS Uyuni Salt Lake (Salar de Uyuni), Bolivia.

Occupying over 10,000km2, the vast Salar de Uyuni lies at the southern end of the Altiplano, a high plain of inland drainage in the central Andes. On the whole, the Salar de Uyuni is very flat, with a surface elevation variation of less than 1m. The Salar serves as the major transport route across the Bolivian Altiplano and is a major breeding ground for several species of flamingos. From the image it is clear that the lake is located at 3700m in the Andes Mountains.

Crecdit: Alex Gerst, ESA, NASA

The local scenery on the ground is as follows.

Credit: Wikipedia

Reference: Alex Gerst’s Tweet
See earthview photo gallery: LiVEARTH