Phong Nha Cave

Phong Nha son dông

Phong Nha Cave
Location Vietnam
Depth Unknown
Length 7729
Discovery unknown
Entrances 2 (river opening and ending)
Difficulty Dangerous
Hazards underground river
Access by Son river
Cave survey Unknown
The entry of Phong Nha Cave
Phong Nha Cave

Phong Nha Cave is a cave in Phong Nha-Kẻ Bàng National Park, a UNESCO World Heritage Site in Quảng Bình Province, Vietnam. It is 7,729 metres long and contains 14 grottoes, as well as a 13,969 metre underground river. While scientists have surveyed 44.5 kilometres of passages, tourists are only allowed to explore the first 1500 metres. It is the second biggest cave in Vietnam.

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