Italian cave with exceptional acoustics and an unsavory history.

"Stairs of the Turks", a chalky white cliff eroded conveniently into stairs, allowing for easy pillaging.

Monasteries on rock pillars, once accessible only by frayed ropes.

This legendary city has been a tourist attraction for centuries.

Where commuters walk through remnants of an ancient Greek necropolis.

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

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

Replicas of Apollo's leonine stone guard cats still line a sacred row in Greece.

This famous archeological mystery may be an ancient example of movable type.

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

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.