which is the best therme in Baden Baden?
We really enjoyed the Friedrichsbad spa. It is the older, more traditional one. It used to be always textile free, but now has 2 days a week where bathing suits are permitted. The Caracalla is newer, larger, has outdoor as well as indoor pools, and does not mandate textile free except in the sauna.
This blogger's descriptions and comparison may help: https://shortgirlontour.com/friedrichsbad-vs-caracalla-spa-the-best-spas-in-baden-baden/