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

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

Terrifying derelict military hospital once housed a recuperating Hitler.

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

An intricate and amazing house built by architect Karl Junker.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

This may be the world's only drive-through windmill.

At the base of this tower, a plaque marks the original center point of the Netherlands.

A farm turned upside down.

This giant radio telescope would be a rusting ruin if it hadn't become such a beloved relic.

A large measuring stick marks the lowest point of a country that is partially under sea level.

An idyllic hotel that gave its name to a supposed shadow government.

For the holidays, the tallest broadcasting tower in the Netherlands turns into one of the world's tallest Christmas trees.

The location of the world's first telescope demonstration.

Building Men of War and Indiamen from Holland's Golden Age.

A radio telescope for listening to the stars, based in one of the cloudiest countries in the world.

The struggle of a small Dutch island against the sea.

This giant wire frame man sculpture is crouched in contemplation.

The 20-mile causeway that separates the Netherlands from the sea.

This hotel was once home to a steamliner company and became the final rest stop for Europeans heading to the New World.