A spectacular cave and a beguiling lake.

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

These sea caves are the source of Xigia Beach's distinct aroma.

Flying high over the small island of Zákynthos is a giant tribute to the mainland.

One of the best-preserved medieval streets in Europe.

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

An ancient Greek monument and a Byzantine church coexist inside this cave.

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

A Byzantine-era church hidden in a wooded area below the Acropolis.

César Baldaccini's iconic sculpture of a 40-foot thumb stands tall in La Défense.

The celebrated eyesore created by starry-eyed sweethearts.

The unique design of these skyscrapers in a Paris suburb led to them being nicknamed "cloud towers."

Executions were once held near this beautiful 18th-century fountain.

This symbol of the French Revolution still stands where it was first planted during the 18th-century.

The remains of the medieval wall that once surrounded Paris with ties to the construction of the Louvre.

This Bordeaux parking garage has 712 indoor spaces, and one outdoor.

The oldest continuously operating mint in the world that has been making coins since the 9th-century.

Lady Liberty's original designer installed a little clone in this French fountain.

Fighting the British and making game shows for over 150 years.

A glamorous hotel that once accommodated French resistance fighters and concentration camp survivors.

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

A massive base for the Nazis' most formidable weapon in the Atlantic.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

Stripes of human ashes cover a back lawn in the most sought-after burial grounds in Paris.