If you are interested in WW2 history, Colditz Castle isn't that far away from Dresden.

After WW2 the East Germans turned it into a loony bin but have been working over the last few years to reopen it as a tourist attraction. It was closed the day we went, but we still made it to the courtyard before they caught us.

As you drive into town you will see it up on the hill, and follow the signs for Schloss (sp?) The saddest thing is the way they've built all these crummy houses around the Castle itself, so it doesn't look so dramatic any more.

Also, you could go to Cologne via Arnhem to see the Pegasus Bridge and museum.