Tham Si Ru Cave
ถ้ำสี่รู
A limestone cave on the southwest shore of Cheow Lan Lake where four passages meet. It was once a hideout for guerrillas and is a standard hiking stop on lake day trips.
Tham Si Ru Cave is on the southwest shore of Cheow Lan Lake. It is named for the four passages that meet inside (“four caves” in Thai). Between 1975 and 1982, it served as a hideout for guerrillas of the Communist Party of Thailand. On lake day tours or floating bungalow overnight trips, after the longtail boat docks, visitors walk about 30–40 minutes up a rainforest path to reach the cave. Inside, stalactites can be seen, and there are views over the lake. A guide is required. The path is slippery and steep, so wear non-slip shoes and bring a headlamp. The cave may close during the rainy season due to rising water or flash flood risks. Check with the national park for the day’s status. The entrance fee is included in the Khao Sok National Park fee.
Opening hours
Part of group tours of the lake area (daytime)
Nearby sights
- Nam Talu Cave
- Cheow Lan Floating Raft Houses
- Cheow Lan Lake
- Coral Cave (Tham Pakarang)
- Three Rocks (Khao Sam Kloe)
- Ratchaprapha Dam Viewpoint
- Khao Sok Main Trail
- Rafflesia Trail