Smoke sauna warming up

Spending the weekend at a cottage with my parents, sisters and our acquaintance family. Our families used to hike and do other nice things together when I was younger.

In the old days all saunas were like this. There's not any chimney, so smoke escapes through open windows and doors. The sauna still gets totally black from the inside. Warming up takes about 4-6 hours, but it's definitely worth it.