The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

The world's largest collection of witchcraft regalia.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

The only theatre in the world constructed specifically for sound movement.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The fairy tale castle of the "fairy-tale king."

The only structure left with direct ties to the Salem witchcraft trials of 1692.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

World's first "penitentiary," meant to be humane, drove men insane.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Explore nearly 400 years of English middle-class home life.

The pioneer of psychoanalysis spent the final year of his life here, still seeing patients on that famous couch.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

One of Ireland's most infamous prisons for rebels including men, women and children.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.