Wat Sri Maha Po, a Buddhist temple in Nakhon Pathom, to the immediate west of Bangkok, is a great place to visit for both lay devotees and non-religious tourists, complete with numerous awesome Buddha statues and a free-to-use herbal sauna, with separate rooms for men and women, in which visitors are treated to the soothing aroma of 14 different medicinal herbs combined. I did notice the steam room had nowhere to sit, and the medicine periodically runs out, so even though it’s free, you can clearly see they have a use for any donations they are given. If I had a small wooden bench you can bet I'd be giving it to them too!