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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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