Kuusijärvi smoke sauna and beach. Great public sauna, maybe best around Helsinki (?)
I had a VERY relaxing (that was much needed) experience.
Went for the sauna, which was crowded, and the ice swimming twice. Didn't feel that cold, actually.
Interestingly, this place is very popular, particularly among foreigners living in Finland as well as Russian tourists. It is never guaranteed that you can actually get to the sauna; now they had a waiting list, and just as I came, they let 10 people in. Glad I was able to experience it.
The saunas are run by Cafe Kuusijärvi, and they are always open.