Hang Sơn Đoòng
This natural cave in central Vietnam, translated from Vietnamese as 'cave of the mountain river', is between 2 and 5 million years old and is the largest known cave passage in the world by volume.
Basic Info
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Category
Cave System
Secondary Category (If any)
Underground Attraction
Length
9 km (5.6 mi)
Known For
Largest Known Cave Passage by Volume in the World
Max Underground Depth
150 metres (490 ft)
Location
See on Google Map
Hang Sơn Đoòng, Tân Trạch, Bố Trạch, Quảng Bình, Vietnam
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