Scariest Places on Earth

Visiting a haunted dormitory in Athens, Ohio; the Olson family spends a night in Chillingham Castle; entering a home in Villisca, Iowa, where an axe murderer killed eight people; exploring the site of an exorcism in Haydon Bridge, England.

A family stays in Philadelphia's Eastern State Penitentiary; visiting the Pine Barrens of New Jersey; exploring the Catacombs of Paris.

Visiting the Walls of Genoa in Italy; the New London Ledge Lighthouse in New London, Conn.; the Amargosa Opera House and Hotel in Death Valley, Calif.; a mental hospital in New England.

A young American explores a haunted Irish castle; an escaped mental patient known as the "Bunnyman"; a family agrees to spend a night at a haunted plantation.

The Catacombs of Palermo in Italy; Fort Pulaski; the history of a voodoo-cursed plantation.

"Poltergeist House"; "White Witch of Rose Hall"; "Ohio's Prison of Lost Souls"; "Plantation Dare Part 3."

Two families spend the night in a haunted New Orleans plantation.

A family returns to a haunted farmhouse; the resting place of Edgar Allan Poe; the ghost of Mary, Queen of Scots, allegedly haunts the Old Bell Inn in Derby, England.

The Ulriches attempt to spend a night in Charleville Castle.

Visiting Italy and the lair of an evil genius known as the "wickedest man in the world"; paranormal activity at a Spanish mission; the tragic history of a ghost factory.

A Los Angeles family attempts to spend an entire night at a monastery haunted by excommunicated monks and the victims they tortured.

"Cemetery of the Angry Undead"; "Poltergeist House"; "Hayden Bridge"; "Living With the Dead."

Visiting Oranmore Castle in Ireland.

The Eaton family must spend the night rubbing elbows with the ghosts at a tumble-down plantation on the outskirts of New Orleans.

The Olson family enter Chillingham Castle in Northumberland, home to dozens of restless spirits.

A Missouri family returns to a haunted farmhouse; an investigator searches for the spirits of a killer and his victims.

"Terror on Bunnyman's Bridge"; "Satan's Dormitory"; "The Jersey Devil"; "Blood Red Lighthouse."

A Voodoo priestess seeks to cleanse evil from a Jamaican plantation; occultist Aleister Crowley founds the Abbey of Thelema in Sicily.

A young American explores a haunted Irish castle; brutal events at a reformatory; paranormal activity at a Spanish mission; Italian mummies.

Visiting Dalhousie Castle in Midlothian, Scotland.

A family from Los Angeles becomes the first people in more than 100 years to spend the night alone on a spooky Italian island.

A California family explores an ancient castle with a long history of murder, cannibalism and ghostly activity.

The Hall family accepts the challenge to spend a night in an Italian monastery cursed by mad monks.

A sanatorium reputedly haunted by former patients; a lighthouse on Lake Michigan; an abandoned hotel and bathhouse; a Scottish castle.

A Los Angeles family hopes to succeed where another family failed -- to spend a night at an Irish castle built by a madman.

Hunting for ghosts in Goldfield, Nev.; the mummies of Mexico; the Hellfire Club; Hot Lake Resort.

A family voyages to Transylvania to spend a night in a 14th-century Romanian castle where Vlad the Impaler was reputedly trained as a ruthless warrior.