My wife and I will be flying into Frankfurt early Dec. We have most of our trip planned, Wurzburg, Rothenburg, Bamberg, Numburg and Munich. We have 2 1/2 days to get from Munich to Frankfurt for flight back to US.( already booked for night before flight near Fra airport) Any suggestions for a town or city to see between Munich and Frankfurt that covers our last 2 days. We are using trains for travel while in Germany. Thanks