In reply to djwilse:
Thalkirchen was good when I went a few years ago. You could look at Heaven's Gate
https://www.kletternmachtspass.de/ for something different - old grain silos 28m high. I've not climbed there, but apparently a 60m rope may not be long enough for some lines, and it can be hard to hear your partner when one of you is at the top.
There's a DAV wall at Gilching too
http://www.kbgilching.de/ It's not as big as Thalkirchen and is 'out of town', but easily accessed on the S-bahn. Expect to pay about 10-16 euros to use the DAV walls, you can hire ropes too (can't remember if that was included in the 16 euros).
If you like machines, technology and engineering and have time off in the day go to the Deutschemuseum, it's excellent.