Caves and Speleology
From underground rivers to the largest caves in the world
What it is and why
The network of caves in Quang Binh province is a Mecca for speleologists from all over the world. Here is Son Doong, the largest cave on the planet with its own ecosystem, clouds and jungles inside. For those not ready for a week-long hike, dozens of more accessible but no less exciting routes are available, where you can see giant stalactites and underground rivers.
The adventure format varies from tourist trails with lighting and concrete paths to wild caves, where only groups with professional guide and full equipment are allowed. Regardless of preparation level, speleology in Vietnam is always immersion into a pristine world of silence, majestic stone columns and crystal clear underground lakes.
Where to do it in Vietnam
Points on the map are real places where this activity can be done. Numbers in the list match the markers.
- Son DoongQuang Binh
Largest cave in the world, accessible only with Oxalis license.
- Phong NhaQuang Binh
Classic route by boat along underground river.
- Paradise Cave (Thien Duong)Quang Binh
Incredibly beautiful halls with convenient wooden bridges.
- Hang VaQuang Binh
Known for its unique calcite pools.
Tips
- Always have a reliable headlamp with spare batteries with you, even if going with a guide.
- Clothing should be made of quick-drying materials, with long sleeves: caves often have wasps and wet clay.
- Choose footwear with aggressive tread — limestone and clay are very slippery.
- Book complex tours (for example, to Tu Lan valley or Son Doong) at least 3-6 months in advance.
Caution
- Absolutely cannot enter caves during heavy rain season (September-October): risk of sudden flood in the cave is deadly dangerous.
- Never deviate from the tourist trail in "wild" caves — possible deep pits and shafts.
- Protect stalactites: touching them with skin fat stops their growth for decades.