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

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

This proud Teutonic warrior rises out of a German forest heralding a victory and measuring lightning.

A top-secret bunker now turned museum, is an eerie look at what life would have looked like in the event of nuclear war.

A distinctive former power plant turned university lecture hall looks like it could make you breakfast.

A ruined castle stands atop a hill surrounded by dragon lore.

This mine is home to the largest man-made hole in Europe.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

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

Largest illuminated advertisement sign in the world.

This "floating railway" is one of the world's oldest monorail systems.

This painted Lego bridge is the product of over a century of locomotive history.

This former steel and coal plant is now a neon-lit industrial fantasia.

Tucked away in a small German apartment is an eclectic museum devoted to West African vodun culture.

An industrial relic is now one of Europe's most staggering art spaces.

This massive steel pyramid can be entered by a set of jagged steps that let visitors stand in its heart.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

The world's first military tank was designed in this English city amid the stalemate of WWI trench warfare.

The oldest of the three remaining bridges in England with buildings on top of them.

Legend says this demonic carving inside a medieval cathedral was one of Satan's minions.

Inside this chapel, Victorian jailers took the separate system to new levels.

Modern commuters still pass through this 2,000-year-old Roman archway.

The charming collection illustrates life in Lincolnshire in the 18th through 20th centuries.