I'll second Spaw on Civil War battlefields. For overall touring, Gettysburg. For the light show...a battlefield description on a large board...I saw them in Gettysburg, Atlanta and Chattanooga, and the one at Chattanooga was vastly superior to the others. (that was ~15 years ago) Then as Spaw said, after you see the battle strategies, drive south and observe the lay of the land...unbelievable. And the music in the presentation is haunting. Bonnie Blue Flag, Dixie, Battlehymn of the Republic, etc.

I've never been to Shakertown, but many people around here make an entire day of it, pick strawberries and everything.

If you make it to Kentucky, I hear the horse park in Lexington is fabulous. I personally make pilgrimages to Natural Bridge, ~1 hour east of Lexington.