I'd highly recommend a trip to the Burg Eltz castle. It looks like about a 2 hour drive from Ramstein and you'd be driving through some really scenic areas of Germany.

http://burg-eltz.de/en/eltz-castle-t...s-history.html

If you are interested in seeing castles and small villages - drive east to Ludwigshafen and then go north along the Rhine river.