Discover giant sinkhole in Vietnam’s Phong Nha-Ke Bang cave system
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Discover giant sinkhole in Vietnam’s Phong Nha-Ke Bang cave system Discover giant sinkhole in Vietnam Phong Nha Ke Bang cave system
A young man recaps his 60-hour exploration of the Phong Nha-Ke Bang caves, including the controversial sinkhole Kong Collapse.