Considering the Am Festspielhaus Hotel Bayerischer Hof in Baden-Baden?
A VT member wrote the following comment about visiting Baden-Baden:
Friedrichsbad by Kathrin_E
One of the two big public spas in town, situated in a beautiful 19th century building. Following the example of the ancient Romans, the bath has a fixed curriculum which takes about 2-3 hours.
No need to bring towels and stuff, everything is provided.
Friedrichsbad is entirely nude. Sexes are separated except in the big pool at the end.
If you mind, better go to Caracallatherme instead.