Leaf peeping is one way to see a city in October. Exploring its eerie past and haunted present is another. Unlike a theatrical horror show, however, what you’ll discover here won’t make you scream—at least not right away. Rather, the experiences will creep back into your brain long after you’ve gone home, when you least expect it, like at 3 a.m., keeping you awake all night long. If you’re traveling with your family, be warned: There’s a minimum-age requirement in most of the history-based ghost tours in these popular vacation spots. Read on, if you dare.Read More The 8 Most Haunted Cities in the U.S.