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Sung Sot Cave with coloured lights

Sung Sot Cave (Cave of Surprises) on Bo Hon island, with coloured lights, Ha Long Bay, north Vietnam. Sung Sot Cave is an excellent example of a old phreatic cave, formed over 500 million years of tectonic and uplifting activity in the limestone rocks, with periods of marine transgression and regression.

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Uploaded on November 2, 2016
Taken on September 25, 2015