Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

Countless grotesque faces stare out from this eerie Prague art wall.

"We gonna rock down to Electric Avenue, and then we'll take it higher..."

These caves secretly held national treasures during World War II.

Legend says this sacred tree was a gift from goddess Athena.

Where commuters walk through remnants of an ancient Greek necropolis.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

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

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

Museum dedicated to the terror regimes of Hungary.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

This equestrian statue of Constantine the Great has been the subject of criticism for centuries.

Breathtaking and huge 430 year old maps of Italy.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

A little sculpture with a large wardrobe.