Museum dedicated to the terror regimes of Hungary.

Open-air museum with a large collection of Soviet-era statues.

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

Gigantic Romanian salt mines used to heal respiratory conditions.

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

Slaughterhouse Five opens its dank doors to fans of Kurt Vonnegut.

Super-heavy Nazi architectural experiment.

This TV tower once secretly housed a GDR intelligence team.

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

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.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

This mysterious and once-grand memorial still embodies a remarkable architectural vision.

A museum of alchemy and a basement laboratory all housed in an ancient building in a Gothic tower.

A youth-centric science center hides an industrial triumph.

Beijing's version of Disneyland, completely abandoned, mostly destroyed.

A Cold War command center is hidden under an idyllic countryside.

This attraction was abandoned after the Chernobyl disaster.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

This derelict superstructure was a very important warning system for the Soviet military.

An eerie, derelict amusement park in Berlin.

Walk through depictions of the torture inflicted on those who go to Buddhist hell.

Time-frozen department store of dangerous and dusty relics.

On stormy days debris from this unfinished and abandoned skyscraper rains down on the Bangkok streets.