The Hampton House National Historic Site. When it was finished in 1790, Hampton was the largest house in America.
This house is over 200 years old. I kept asking the park rangers if it was haunted, and they kept saying NO. When ever I would ask about the ghost stories, they would be like "those are made up". They are full of it, this place is obviously haunted.
If you like old stuff, ghosts, and fake food (who doesn't!) I would say it is worth a trip to the Hampton House. The tours and everything are free, and then you can peruse the graveyard and clearly haunted slave quarters and farm house.
Baltimore: It's more than just guns and crack.