3,000 market stands in five former Zeppelin hangars.

A futuristic, brutalist masterpiece that is also strangely prison-like.

The abandoned military base looks like a post-apocalyptic wasteland.

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.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Ruins of a 13th-century fortress perched above a breathtaking Mediterranean bay.

This field of half-buried stone crosses was the burial place of a sect of heretical gnostics.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.

The ruins of an abandoned medieval city where the last Byzantine emperor was crowned.

Thousands of rusting train cars have been slowly falling apart on the edge of Greece's second largest city.

Monasteries on rock pillars, once accessible only by frayed ropes.

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

A gleaming white and undulating tower marks the border between Georgia and Turkey.

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

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

Luxury hotel turned into a refugee camp, then turned back into a luxury hotel.

Unusual building appears to be haphazardly built from randomly piled bricks.

These Stalin-era industrial 'death traps' hang lifeless above the city

A former imperial sea-fortress and Soviet prison.

This stoic bronze soldier stands as a symbol of Russian sacrifice or Soviet oppression, or maybe both.

This dizzying tower was built to better broadcast the 1980 Moscow Olympics.

This soviet pilot's graveyard is filled with headstones made of airplane fins.

Abandoned Soviet base once stocked with short and medium range missiles pointed at western Europe.