PHOTO TOUR: The Trans-Allegheny Lunatic Asylum's Corridors of Horror

The Trans-Allegheny Lunatic Asylum was built to help make people well, but it soon became a living hell.

LISTEN: Ghostly Encounters at the Villisca Axe Murder House and Trans-Allegheny Lunatic Asylum

A ghost hunter shares unsettling anecdotes—and chilling audio—from investigations at two of America's most haunted sites.