Located in Ulan County of northwest China's Qinghai Province, Caka Salt Lake is so clear it can sometimes act like a mirror, reflecting the vast sky.
The lake is located in the eastern Qaidam Basin, which has the largest salt reserve in the world.
Caka Salt Lake, Qinghai, China. /VCG Photo
A hole in Caka Salt Lake, Qinghai, China. /VCG Photo
Caka Salt Lake under the Milky Way, Qinghai, China. /VCG Photo
The Caka area used to be a shallow sea in ancient times.
Tectonic movements of Eurasian and Indian Ocean plates had formed the Qinghai-Tibet Plateau, causing the residual seawater to accumulate in low-lying areas, thus forming the ancient saline lakes.
Water kept evaporating, which eventually shaped the many salt lakes in the Qaidam Basin.
(Cover image: Caka Salt Lake in twilight, Qinghai, China. /VCG Photo)
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