Going to book a holiday this weekend. We'll be staying in Munich for five nights and then looking to do something else. Is there much else to see and do in that area (I'll be flying back out of Munich), or should I head over to Prague or Vienna by train? I have never been over to that area and really know very little about it at all. Any advise would be appreciated. P.s, Mrs. B loves old buildings, castles etc. Thanks.