Somewhere in this thread is a question about the train in Munich. If you buy your ticket and get on the train a guard will appear and try to charge you a large fine...because you didn't stamp your ticket before you got on the train. The people who sell you the ticket neglect to mention this aspect. Don't get on without it. They can spot the tourists. And if you go to Berlin, take the time to go to Potsdam. If you can get to Weimar, you must see what has become of the concentration camp at Buchenwald, just north of town. Unlike the places in the western half, it has survived in pretty much the state it was in at the end of the war, with the addition of a museum and information about how the Russians used it.