Where commuters walk through remnants of an ancient Greek necropolis.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

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

This legendary city has been a tourist attraction for centuries.

The hallucinogenic center of the ancient world.

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

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

These unique markers designate the route American forces took during the Liberation of France.

The mummified heart of Louis XVII, the lost dauphin of the French Revolution.

His "Lionheart" is entombed separately from the rest of his body.

An image of the legendary saint stands in the shadow of a cathedral she liberated.

This small red school was where Germany signed their surrender during WWII.

A place to see how French aristocrats lived in the early 1900s.

Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

Lyon's "Wall of the Silk Weavers" is one of the largest murals in Europe.

A colorful piece of contemporary art cheerfully clashes with Lyon's historical architecture.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

Hundreds of hidden passageways weave through the old quarters of Lyon.

Walk through living pictures and music in the Cathedral of Images.

This ancient theater was once the home of fierce gladiatorial battles.

Balconies that have a most unusual accent.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.