Hang Son Doong

38.5 million m³

Largest cave passage by volume, Vietnam

Estimated Natural oddities · Verified 2026-10-31 · WWV-WW-004

Hang Son Doong in Vietnam has passages over 200 metres tall and 150 metres wide, with a jungle growing inside. Its volume is around 38.5 million cubic metres.

Larger single chambers exist, such as Sarawak Chamber.

Sources

Wikipedia: Hang S%C6%A1n %C4%90o%C3%B2ng
Wikipedia: Cave