"Haunted History" gives viewers a glimpse into history that isn't taught in schools. Each episode looks back to events that took place at well-known locations and features advisers discussing current paranormal activity at the sites. Among the sites featured are four locations in Gettysburg, Pa., connected to the Battle of Gettysburg -- where ghosts appear -- and a 19th-century Chicago hotel, the "Murder Castle," that was designed for dispatching victims -- whose spirits still appear more than a century later.
