The ancient Greek Titan guards this massive dam holding a lightning bolt to symbolize electricity.

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

This abandoned Soviet circus is slowly being restored to its Communist-era glory.

Ancient rock-hewn town that witnessed key events of Georgian history.

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

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

The shattered remains of the world's once tallest structure.

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

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

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

Sculpture that doubles as a time capsule so that life can survive radiation outside Chernobyl.

The deepest metro station in the world.

One of the most poignant ruins of the Chernobyl nuclear disaster, the local football team's stadium has been quickly reclaimed by nature.

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.

Ruins of a late 1950s Polish ski jump ramp in the middle of the city.

Thanks to its heroic service during WWII this Soviet castle has been turned into a monument towered over by a brutalist titan.

340-foot statue built to honour the Heroes of the Soviet Union.

The largest catacomb system in the world.

A monument to Lenin has been transformed into a statue of everyone's favorite black-helmeted, fool-choking Sith Lord.

The second-deepest known cave on Earth, hidden in an extremely remote mountain region.

Azerbaijani ghost town, decaying after a war left it an armed forces buffer zone.