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A man takes pictures with a cellphone in the Cave of Valporquero in Leon, Spain, on April 27, 2018. Valporquero is a cave formed by an underground river. (Xinhua/Guo Qiuda)
Take tour in Cave of Valporquero in Leon, Spain
Source: Xinhua| 2018-04-28 14:31:24|Editor: pengying
