In Taipei, new Taipei, Keelong, Yilan. The kind where you scrub yourself clean while sitting on a small stool then go soak in hot water / hot springs.
I almost hate to recommend this place because I don’t want it to get crowded, but I really like 森林風呂 in Jiaoxi, Yilan. It’s just as you describe. It’s segregated by sex, as one would expect with a naked hot spring. It has pools with a variety of temperatures and a sauna. Bring your own towel, or you can rent one. They have lockers inside for your personal belongings.
Itching to see naked old dudes?
I can just look in the mirror for that…
Thanks. The pictures on google maps look good. Only 80 NTD for admission? That’s cheap!