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

The hallucinogenic center of the ancient world.

This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.

This architecturally eclectic fortress witnessed centuries of bloody turmoil, including the massacre of its ruling clan.

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

You'll find just about anything in this funky Tbilisi flea market.

With over 10,000 lights, this engineering marvel lights up the city after dark.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

A small but hugely whimsical theater where marionettes play out the "The Battle of Stalingrad."

A lively circle of dancers in the Georgian capital commemorates an ancient rite of spring.

Fortified homes of highland warriors that are still in use today.

Despite being tiny and rural this Georgian airport looks like a sci-fi boondoggle.

The first skyscraper to include a Ferris wheel built into the facade.

A Turkish ghost town abandoned in a population exchange with Greece.

This abandoned gold mine found a second life as a post-apocalyptic film set.

An ancient Roman theatre restored to its former glory in the Spanish city of Cartegena.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

The beautiful bas-relief lines a sliver of a 19th-century walking path between two charming French villages.

Claude Monet immortalized this medieval bridge in two of his paintings.

Most of Britain's gold reserve was secretly stashed here after the start of World War II.

Charles Dickens described the concert room in this amazing Victorian hall as "the most perfect room in the world."

The tower was originally used as a chimney for the waste incinerator of St Johns Precinct and Market.

This whimsical public art installation is a unique homage to Liverpool's industrial heritage.