Bedrock bath?

I went back to take French lessons. It wasn't too bad. I remembered more than either of us expected. I'm more surprised than my teacher Keiko-san though. (Have a safe trip to France Keiko-san!)
In the afternoon, I went to 岩盤浴. (ganban-yoku... Bedrock bath???) It's like steam bath. You lay yourself on a bedrock which is warm about 40 degrees. You suppose to sweat a lot. It has
detoxification. I should keep going there regulary.

Before and after pic. Well, since both my mom and I did sweat a lot, the camera got fogged.