This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This exquisite, alienesque piece of Soviet architecture is being threatened by modern shopping malls.

This underground transport hub doubles as an art gallery.

The dining hall that nourishes workers in Chornobyl's Exclusion Zone is also open to visitors.

The deepest metro station in the world.

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

An Art Nouveau building covered in animal gargoyles and grotesques.

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

This unassuming museum's slogan translates to “there is a limit of sadness, anxiety has no limits."

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

This attraction was abandoned after the Chornobyl disaster.

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

This oversized tribute to the nation's tiniest coin highlights the value of small contributions.

Once built to inspire young Soviet minds through astronomy, this dome now stands as a quiet relic of a vanished era.

A statue dedicated to the founders of communism.

The largest wine cellar in the world is a 150-mile network of underground caves near the capital of Moldova.

An Italian restaurant became a rock-and-roll hangout and the lair of the "Hollywood vampires."

A legendary West Hollywood bar where celebrities shoot pool with the locals.

This L.A. fixture has been serving hot dogs out of a giant hot dog since 1946.

Her final resting place was intended to be modest and private, but the power of her popularity continues to draw visitors.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

A Looff creation in Santa Monica best described as “a California-Byzantine-Moorish-style fantasy.”

Grab a latte at the birthplace of modern American skateboarding.

A three-story, three-dimensional hobo clown in a tutu welcomes CVS shoppers.