No recomendations, but I am SOOO jealous!!! I have family in Germany, and I remember biking w/ my cousin when I was over there YEARS ago! - 1989 for the reunification (or was it 90-91?? ohh my memory). Of course back then I hated exercise and saw it as just a way to get to the store and back. If Iwere there today I would enjoy it for all it's worth!
Have fun!!! I LOVE it there!!