The one-time stronghold of the noble Douglas family, now home to ghost sightings and nesting birds.

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

This castle was established by the 4th Duke of Montrose and is connected to the Buchanan Clan.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

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

A 30-acre garden inspired by the principles of modern physics.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

The encased skull that is widely believed to belong to St. John the Baptist.

An intricate and amazing house built by architect Karl Junker.

This historic little railroad runs through some of the most beautiful scenery in Germany.

Abandoned substation turned village treasure.

These tenacious 14th-century towers defied demolition and are now a fairytale vacation rental.

Horrifically creative torture devices and shame punishments line the walls of this chilling museum.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

The footprint of a frustrated devil in Munich's Cathedral.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

Slaughterhouse Five opens its dank doors to fans of Kurt Vonnegut.

This unique Renaissance castle was turned into a home for Nazi occultism.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

The music is over at the Ballhaus Riviera Ballroom, but the ballroom remains in haunting disrepair.

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

This early version of the guillotine was used to execute the man responsible for its construction.