For me its about the true pleasure of heat
Wet or dry and the luxury plunge of true coldness
Hence top tip its all about The Therme Culture of Germany and celebrate it nude. Neptunbad, Claudius and Mauritius Spa Hotel. Think living it real, heat, water, steam and true naturiste relaxation. A world away from real life and hence the value. Gosh sorry did not tell you where in Germany, Cologne or Koln - so good they named it twice. And please me if you value quality and naturiste therme, spa culture - das ist gut - dast ist vey gut !!
Yes ! And can't forget the Friedrichsbad in Baden-Baden and Wiesbaden's Kaiser-Friedrich-Therme ! Luxury of the champagne water, the palatial settings, the steam from the earth, the feelings of pure relaxation without clothes.
In case anyone is interested in checking those places out... These are the links to the places in Cologne, Germany... Neptunbad ~ https://www.neptunbad.de/ Claudius Therme ~ http://www.claudius-therme.de/ Maruitius Therme ~ http://www.mauritius-ht.de/