Kaiser Friedrich Therme
The roman-irish bath - Kaiser Friedrich Therme - in Wiesbaden. Like the romans about 2000 years ago, you can take a bath in the water of Wiesbaden's hot springs here. There is also a finnish sauna, a russian steam bath, a tropical ice rain, a rasul, a sand bath, a "lumenarium" (room with different changing colors), a music/meditation room and a lot more...
Since cameras aren't allowed in the bath, I had to take a "photo of a photo". Credits go to Xenia Drebes who took this photo.