The final resting place of many of Germany's most famous communists.

Swedish skyscraper with a 90° twist.

Beirut's thinnest building was the result of feuding brothers.

Only a handful of these gorgeous historic waterwheels remain but even those are in danger from local unrest.

Ruins of the Crusaders' headquarters.

A small part of Russia that does not touch any other part of Russia.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

Budapest's Communist-era statues, banished to the suburbs.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

Museum dedicated to the terror regimes of Hungary.

This oddly shaped building is a surprising Soviet-era crematorium.

A forgotten remnant of the Soviet Union, Transnistria is an unrecognized country hidden behind a heavily militarized border between Moldova and Ukraine.

One of downtown Berlin's last reminders of its Communist past.

Berlin's old airport.

A 12th-century fortress containing some of Berlin's oldest buildings.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

Super-heavy Nazi architectural experiment.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

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

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

An eerie, derelict amusement park in Berlin.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.