A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

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 fairy tale castle of the "fairy-tale king."

An eerie, derelict amusement park in Berlin.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

This extensive collection of vintage Soviet cars is the only one of its kind in the Caucasus.

A cluster of historic bathhouses built on the famed hot springs that gave the Georgian capital its name.

The decaying remains of a once-luxurious Soviet spa town.

The secret room where early Bolsheviks cranked out propaganda fliers on a smuggled printing press.

A cylinder monument with a spectacular vista commemorates a friendship that some say never existed.

A museum glorifying the life of Stalin, located in the city of his birth.

The site of a devastating modern-day mud volcano eruption that buried parts of a village.

This peculiar lake of pitch is so thick and viscous that one can walk on its surface.

An encyclopedic collection of mammal penises.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.

A giant interactive periodic table with real samples of the elements.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

One man's personal collection of KGB memorabilia is presented along with his strange viewpoint.

Looming communist pillar with a Czech twist.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

A sculpture of the iconic East German car on four legs is a tribute to those who traveled to Prague seeking asylum.