Hang Son Doong

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    10-Jan-2016
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World’s Largest Cavern Discovered In Viet Nam in1991. Hang Son Doong. meaning Mountain River Cave. British scientists from the British Cave Research Association, led by Howard and Deb Limbert, conducted a survey in Phong Nha-Ke Bang from April 10-14, 2009. - PowerPoint PPT Presentation