Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

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

The Lone Star plaque hangs in a bombed-out bunker in Normandy to honor a Texan colonel's heroic actions on D-Day.

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

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Before the electric telegraph, a chain of stone towers carried messages across France.

An ancient monastery, a locked room, and a mysterious book heist.

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

One of the largest ochre quarries in the world, hidden in a limestone landscape.

A mountain cave is the site of archaeological findings and Paleolithic rock art.

A petite white lighthouse perched on the ancient core of Stromboli Volcano.

A volcanic old faithful, Stromboli has been erupting continuously for the last 2000 years.

Tourists to the mountaintop Sicilian town often overlook its ancient fortifications.

Cave shrine on Monte Pellegrino.

A study of Fascist era Art Deco design in Italy.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

Why a column on the entrance is inscribed with a verse from the Quran is one of Sicily's many mysteries.

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

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

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

Where commuters walk through remnants of an ancient Greek necropolis.

The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.