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Take tour in Cave of Valporquero in Leon, Spain

Source: Xinhua| 2018-04-28 14:31:24|Editor: pengying
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SPAIN-LEON-VALPORQUERO CAVE

Photo taken on April 27, 2018 shows the Cave of Valporquero in Leon, Spain. Valporquero is a cave formed by an underground river. (Xinhua/Guo Qiuda)

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