Even those who don't believe in ghosts must admit that tales of the supernatural can be particularly gripping, and certain places just have a general eeriness about them. Throughout the United States, numerous graveyards, old homes, prisons, and hotels have collected their share of ghost stories, often passed down for generations. Some places even play up their lore, offering ghost tours or Halloween attractions. America's scariest spots include places where horrific crimes took place, a cave where it's said a malevolent witch lurks, and a graveyard where some say a buried skull can still be heard screaming underground. Read on, if you dare.