I admit - I'm biased towards this place since I effectively used it as my bath/shower for a period of two weeks last Winter when our household heating system broke down. But it's a better excuse than any!

Holthusen-Bad (or Kellinghusen-Bad) is one of my favorite places to relax. I love swimming during all seasons and Holthusen-Bad offers a nice, affordable range of selections for swimmers and loungers of all persuasions. They have a large heated pool, a wave pool, an outdoor pool and a super-heated mini-pool for relaxing. It costs about 6eu for an hour and a half.

I like that they offer private dressing compartments, which is not something all European spas actually have. If you're not into the European-random-naked-people-thing, Holthusen-Bad offers small compartments in the dressing area. Classy!