Numerous saltwater evaporation ponds have been built in China’s Qarhan Playa since the early 1990s. Located in Qinghai Province, Qarhan was once a single unitary lake and is now an expansive salt flat covering 2,261 square miles (5,856 square km). It is heavily exploited for its valuable reserves of salt, potash, lithium, iodine and other minerals.
37.024081°, 95.138925°
Source imagery: Google Timelapse
Qarhan Saltwater Ponds