Hrm .. Bodensee area, my wife is from down there, I will talk to her about it tonight.
OH! are you going to be there alone or with a wife? Because Insel Mainau (it belongs to Sweden somehow) is pretty darn nice, I took my mom there when she was here for my wedding.
Schloß Sigmaringen (Hohenzollern) in Sigmarigen might be something to see.
Sigmaringen is also near the Danube Valley area down there, which is very nice.
Ive been to Bodman, Konstanz and Kreuzlingen, this time of the year the apples should be nice, you missed strawberry time, we always go with my wife's grandma to get strawberries from the fields down by Bodman.
Hrm what else? Schaffhausen is nearby in Switzerland, you could cross the border quick and see the Rheinfels (Rhein waterfalls) in Schaffhausen.
Again, Ill ask my wife what she thinks, but it would be good if you also gave an idea what you want to see and in which direction you want to go. If you are coming from Bayern, then you probably dont want to drive another hour west to Switzerland, like I suggested, but driving north or east might not be bad.
[This message has been edited by Randy03 (edited 9/17/2009 7:42a).]