Phong Nha Cave
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| Phong Nha Cave | |
|---|---|
 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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