It has an American Dream Car exhibit, Europe's largest Formula One collection, and many, many mannequins.

This giant, 83-year-old ship elevator is an engineering feat to behold.

This German "living museum" is maybe a bit too immersive.

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

The NASA scientists behind Apollo 11 started out developing Nazi weapons at this abandoned German rocket factory.

This East German military command bunker was ready for World War III.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

Solar observatory doubles as a daring display of Expressionist architecture, much to Einstein's chagrin.

Germany's Glienicke Bridge has a shady history of clandestine meetings, espionage, and spycraft.

Metro station with a claim to rock n' roll fame.

One of the world's heaviest musical instruments towers within a popular urban park.

The ruined remains of the airport Claus von Stauffenberg departed in his failed attempt to kill Adolf Hitler.

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

Hitler's bleak vision of relaxation still stands as a mostly abandoned 10,000-room resort complex.

This incredible stone temple is a monument to death, victory, and fantasy architecture.

A former ironworks that was the first UNESCO industrial site.

The "Prussian Versailles" that is as glorious today as when it was built.

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

It's always summer at the beach inside this former airship hangar.

A quaint Russian village in the middle of a German metropolis.

The prototype for all Nazi concentration camps.

Terrifying derelict military hospital once housed a recuperating Hitler.

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

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.