Palais Thermal

I was there in January 2020. Amazing place! Loved the view from the open-air pool on the roof!
The first floor is the old bath house and it is clothing optional. Has numerous pools and beautiful historic interior.
The second and the third floor is where the modern SPA area (textile-free) is located. Has several saunas, an indoor pool on the second floor and an outdoor pool on the roof in front of the panorama sauna with an amazing view towards the mountain.
The place never gets too crowded and you can always find a spot to truly relax there.