Unexplained phenomena pervade the Pennsylvania town of Gettysburg, where witnesses claim to have seen the ghosts of Civil War soldiers and other ominous sightings at locations connected to the infamous battle.

Serial killer H.H. Holmes builds a hotel in Chicago complete with gas chambers, trap doors, acid vats and other sinister constructions.

The Pennhurst State School and Hospital, once an institution for physically and mentally disabled individuals, is allegedly haunted by the spirits of its neglected patients and abusive employees.

An unassuming wine box purchased at a local estate sale unleashes paranormal activity upon its numerous owners.

The restless spirits of dismembered murder victims offer clues about the Mad Butcher of Kingsbury Run, a serial killer who stalked the shantytowns of 1930s Cleveland.

Four locations connected to the 1692 Salem witch trials are plagued by the restless spirits of the innocent.