Tiny castle in the middle of the Rhine made you pay to pass.

Legendary site where an evil bishop was devoured by rodents.

The monumental home of Prussia’s eccentric "Cannon King."

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

This small Bavarian graveyard is filled with empty graves for German soldiers lost during the World Wars.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

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

The prototype for all Nazi concentration camps.

A church of bones, decorated with 40,000 human skeletons.

A marvel of technology a century ago, this disused power station now offers a lovely glimpse into the industrial design of the past.

Once the home of a hermetic monk, this cave now houses a small church.

The legendary building that needed ghostly approval before being built.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.