The luminous purple sky is mirrored in the thin sheet of water across the world’s largest salt flat, Salar de Uyuni, in Bolivia.

Photograph by Xiaohua Zhao

(TheGuardian)

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Time lapse of clouds moving over shallow lake Salar de Uyuni, which, when it gets water in it, becomes so reflective the surface acts like a mirror. Even used as a calibration spot for satellites.