Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

The hallucinogenic center of the ancient world.

A spectacular cave and a beguiling lake.

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

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

This half-finished "city of toys" was almost Italy's own Las Vegas.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.