Freiburg.............beautiful, I have a holiday house in Hinterzarten which is about 35 kms from Freiburg, up in the mountains...........my favotite part of Germany.
As for the Autobahns, yeah they are good but they are so full these days, 15 years ago they were great to drive on....not so much traffic and not so many idiots on the them........sorry shouldnt say idiots but I wrecked my car 2 days ago on the autobahn due to an idiot.....he could have killed me.........thank god for new safety technology