While driving around in Germany, I had an opportunity to visit the Spreewald area.
There are nice kayaking opportunities. And a thermal bath! Amazingly, in such a flat and far-away-from-volcanoes-place! But it turns out that the thermal baths are due to a drilled hole deep to the ground, made in 1990s!
Nevertheless, very nice swimming at the Spreewald Therme!
Photos and text (c) 2019. More swimming and sauna stories can be found from planetswimmer.com and saunablogger.cool web sites!