This self-professed country club is touted as Thailand’s only mud treatment spa. Phu Klon is 16km north of Mae Hong Son in Mok Champae. If you haven’t got your own wheels, you can take the daily Ban Ruam Thai- or Mae Aw-bound sŏrng·tăa·ou (passenger pick-up truck; 25B), but this means you might have to find your own way back.
Discovered by a team of geologists in 1995, the mud here is pasteurised and blended with herbs before being employed in various treatments. There’s thermal mineral water for soaking, and massage is also available.