I would agree. The wife and I were there for a day, wish we had more time. The walking ghost tour in the evening was very interesting. More history than paranormal.

 

Here's yet another vote for Gettysburg.

My wife and I did both a Segway tour and horseback tour - both were well worth the money spent.

I'd also say that 2 days is the bare minimum for Gettysburg. We did three and we're planning to go back some day.