For a history buff, Harpers Ferry, W. Va, is both beautiful and interesting. The National Historical Park there is very cool:
http://www.nps.gov/hafe/
The Amtrak does stop there and there is a hostel:
http://www.hihostels.com/performLoca...iliateID=97060
It's really a nice spot in West Virginia, and the Shenandoah is beautiful. The park has lots to explore and if you like the outdoors, it's especially wonderful.