Son Doong Cave
CountryVietnam
RegionQuang Binh
Discovered1991
Size/Depth5 km long
About Son Doong Cave
The largest known cave passage in the world by volume. Contains its own weather system with clouds and fog. Has a 70 m tall stalagmite, the tallest known. An underground river flows through it. A section collapsed creating a skylight where a jungle grows inside.
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