Scream City Washington DC features two indoor impressive haunted houses located at RFK Stadium/DC Armory in the District of Columbia. The Exorcism Estate and Slaughter Factory can also be a real test for your nerves as their creators have gone pretty far to scare the guts out of you. If you feel like you can take more horror, take a haunted houses tour to see the scariest places in Maryland, Virginia, and the District of Columbia. That might be much more fun than your regular sightseeing!