Tour Alton, Illinois...One of the Most Haunted Towns in AmericaA town of about 25,000, Alton has earned its title for many reasons, and it's why visitors include Alton Hauntings Ghost Tours on their pre-Halloween itineraries. We'll start with The First Unitarian Church, one of the stops on the tour and what riversandroutes.com labels as "extremely haunted." Author Troy Taylor profiled the prison for PBS 14 years ago. Alton Hauntings is still booking summer tours, but maybe you'd rather wait until there's a gothic chill in the air come October. LOOK: 25 reportedly haunted places across America Stacker has assembled 25 haunted places across America—from hotels and theaters to murder scenes and cemeteries—based on reported ghost sightings and haunted histories.