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.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

A tribute to the beloved, kind-hearted "homeless mayor" of Silver Spring.

A plaque claims this artwork outside a children's hospital was used in the 1998 Quidditch World Cup.

These barriers stand as stark reminders of Northern Ireland's troubled past.

In the ruins of Glastonbury Abbey lies the alleged resting place of the legendary king.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

Bombed and burned, this monument represents the often controversial ties between Vietnam and Cambodia.

The capital of Cambodia is named after the hill on which this ancient temple complex stands.

The largest Buddha statue in the Western Hemisphere is just 50 miles north of NYC.