If you're in Munich and you like Art Nouveau and would like to go swimming or to a nice sauna place I can recommend Muellersches Volksbad. It is very close to Rosenheimer Platz or Isartor. ( Approximately 10 minutes walk from there) and during summer it has a little cafe in front of it where you can sit and enjoy the sun. And of course also very nice to go there in winter when it's freezing cold outside and you can sit in a hot sauna!
And some pictures from inside ( where I couldn't take pictures ;))