People.com Halloween Party

The Scariest Places in America

These asylums, horror film locations and other spooky sites show the creepier side of our country's history

EASTERN STATE PENITENTIARY, PHILADELPHIA

This now-defunct prison which dates to 1829, lists two options for visitors: traditional daytime tours or an evening haunted house experience, Terror Behind Walls, which allows guests to participate in the shenanigans — if they dare. "Those who opt in … may be grabbed, held back, sent into hidden passageways, removed from their group, and even occasionally incorporated into the show," the site says.