Phil Moehring: Spend a day in the city spa - come early to get a good chair, but don't be German and #occupy it all day. The OMM pool is incredible, prepare to get lost in time and space.
Teufelsseechaussee (im Forst Grunewald), Berlin, Berlin
Historic and Protected Site · Grunewald · 47 tips and reviews
Phil Moehring: Go with a guided tour from http://berlinsightout.de/ if you want to hear some history, see the buildings from the inside, and more. Go on your own if you are adventurous!But, go. It's amazing.