A sculpture park of the tossed aside relics of the USSR, from Stalin to a massive Soviet emblem.

This open-air museum was originally a World War II testing ground for German missiles and rockets.

A vast and unlikely aviation museum kept alive for over 50 years due to one man's tenacity.

This one-time health resort was used by aristocrats around the world.

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

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

The world's greatest slide descends 18 stories from this looping mountaintop viewing platform.

Romania's only crater lake with water as pure as if distilled.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

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

Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

Former headquarters of the KGB.

Back in the tiny USSR.

Dr. Strangelove-esque tours reveal the inside a bunker once reserved for Stalin himself.

The former 1920s mansion of a prominent Catalan developer was used as the Soviet Embassy during the Spanish Civil War, and there is still a bunker below the garden.

In the land of the Light Brigade stands a testament to the Cold War.

Museum celebrating the achievements of the Soviet space program.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

Moscow's imposing monument to the Space Age.

This Berlin island is home to a flock of free-roaming peacocks, as well as a historic ivory folly.

Ruins of a German Castle on top of a towering stone pillar.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

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

The industrial monstrosity known as Bagger 258 is a colossal mining machine built in the DDR - but now left for dead in a German field.