At this popular bòr nám rórn, originally developed by Japanese soldiers during the war, you can soak in three geothermal pools (45°C, 42°C and 39°C – this one is shallow for kids) and then cool down in the adjacent stream or get a massage. It's 20km south of Thong Pha Phum on Hwy 323, are accessible via buses (30B, 30 minutes) to Kanchanaburi.

It's an easy 400m walk from the main road to the pools. Lockers are available.