The Biggest Cave In The World Is In Vietnam
The biggest cave in the world is Son Doong Cave, also called Hang Son Doong, in Vietnam. It is located in Phong Nha-Ke Bang National Park in central Vietnam, near the Laos border.
| Quick Fact | Details |
| Cave Name | Son Doong Cave |
| Country | Vietnam |
| Location | Phong Nha-Ke Bang National Park |
| Known For | World’s largest single cave passage |
| Size | About 200m high, 150m wide, and at least 6.5km long |
How Big Is Son Doong Cave?
Son Doong Cave is recognized as the biggest cave in the world by single cave passage. Its size is almost hard to picture:
- Height: around 200 meters
- Width: around 150 meters
- Length: at least 6.5 kilometers
- Total surveyed length: often described as nearly 9 kilometers
- Estimated volume: about 38.5 million cubic meters
- Tallest stalagmites: around 70 to 80 meters
- Famous formation: the Great Wall of Vietnam, a calcite wall about 90 meters high
- Inside the cave: an underground river, collapsed roof openings, misty chambers, and jungle-like sections where sunlight enters
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Where Is Son Doong Cave Located?
- Country: Vietnam
- Region: Central Vietnam
- National park: Phong Nha-Ke Bang National Park
- Nearest travel gateway: Dong Hoi
- Known for: Limestone caves, underground rivers, and dramatic karst scenery
For travelers planning a wider Vietnam route, the country has several major stops worth considering beyond Phong Nha.
Can You Visit Son Doong Cave?
Yes, but Son Doong Cave is not a casual sightseeing cave. Access is limited and usually requires a guided multi-day expedition.
For easier cave visits, travelers often choose nearby caves in Phong Nha-Ke Bang, such as Phong Nha Cave or Paradise Cave.
Before You Explore Vietnam
A remote natural wonder like Son Doong is easier to plan with reliable mobile data. Maps, bookings, weather updates, and transport details all become simpler when your phone stays connected.
For Vietnam travel, Eskimo offers a Vietnam eSIM plan without physical SIM card swaps. New Eskimo users can also get free 500MB of Global Data.
FAQ
What Is the Biggest Cave in the World?
The biggest cave in the world is Son Doong Cave, also known as Hang Son Doong, in Vietnam.
Where Is Son Doong Cave?
Son Doong Cave is in Phong Nha-Ke Bang National Park, in central Vietnam, near the Laos border.
How Big Is Son Doong Cave?
Son Doong Cave is about 200 meters high, 150 meters wide, and at least 6.5 kilometers long. Its total surveyed length is often described as nearly 9 kilometers.
Can Tourists Visit Son Doong Cave?
Yes, but access is limited. Son Doong is usually visited through guided multi-day expedition tours, not casual day trips.
