This once architecturally advanced housing complex is now a haven for squatters that still bears the scars of war.

This pink watchtower served as the seat of the Greek government after independence from the Turks.

The only surviving choragic monument is a trophy awarded in 334 BC for the winning dramatic chorus.

What once sat in the world’s spotlight is today a largely disused ghost complex.

The abandoned summer estate of the former Greek Royal Family.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

This abandoned Greek island was the last active leper colony in Europe.

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

Where commuters walk through remnants of an ancient Greek necropolis.

This legendary city has been a tourist attraction for centuries.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

The hallucinogenic center of the ancient world.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

Long tunnels run under the ancient chariot racing circuit to the tower.

Stunning Roman aqueduct used for 1900 years and still standing.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

Elaborate tile work in this railway station tells the story of Portugal.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

This historic square in Nepal is home to temples dating back to the third century.