This 16th-century Moroccan fortress-turned-armory museum offers prime views of the historic quarter in Fes.

The ruined doorway is a portal to the building's turbulent and torturous past.

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

The designated Jewish quarter in Fez dates back to the 15th century.

Deliberately hidden for centuries, the magnificent Saadian Tombs were eventually uncovered in 1917.

An iconic and controversial ancient Iberian funerary urn with a hauntingly penetrating gaze.

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

The hallucinogenic center of the ancient world.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

This striking sculpture of Icarus honors Greece's fallen flyers.

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

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

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

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

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

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

An ancient octagonal weather station named for the eight Greek gods of wind.

Where commuters walk through remnants of an ancient Greek necropolis.

A sharp sculpture made of thousands of pieces of jagged glass.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

This peaceful sanctuary is one of the oldest Buddhist temples in Colombo.

One of the biggest markets in Asia, under one of the continent's largest domes.