Doesn't "Bad" means " baths" in German ? Like in Marienbad, or Baden-Baden ? If any German-speaking RDishers can confirm
yes, you are right, in general the word "Bad" means "bath"...but it is also used in the sense of a health spa, where therapists apply hydrotherapies amongst other therapeutical applications (sauna, massages, etx).
"Marienbad" for example is one of the most famous health spas in the Czech Republic (Mariánské Lázně ) Mariánské = of Maria and Lázně = health spa.
Mariánské Lázně was visited by many famous and important guests, for instance the British king Edward VII., Johann Wolfgang Goethe, Fryderyk Chopin, Mark Twain, Nikolaj W. Gogol, Thomas Alva Edison, Franz Kafka, Jan Neruda, Antonín Dvořák, Tomáš G. Masaryk, and many others, who where mesmerized by it's natural surroundings and the healing effects of the natural springs there.
The natural springs of Baden-Baden were already known to the Romans. And it is said that the bath-conscious Roman emperor, Caracalla, once came here to ease his arthritic aches. Roman fragments and its ancient sculptures are still to be seen, and in 1847, the well preserved remains of Roman vapour baths were discovered just below the New Castle.
It's all to do with natural springs, baths, saunas, hydrotherapy, and homeopathy - also Sebastian Kneipp was a big advocator for hydrotherapy.