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

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

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

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

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

These red marks, seemingly placed at random, are in fact not.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

Handsomely crafted representations of our round planet.

The beautiful baroque library of the Hapsburg empire.

This gallery commissioned by Cardinal Spada is known for its magnificent optical illusion.

A forgotten "city of water" underneath the famous Trevi district.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

2300-year-old Roman road connecting the empire.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

An alchemist's "magic door" stands in the middle of a Roman park.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Follow the original medieval paths that wind through this intriguing section of the city.

J.R.R Tolkien, C.S. Lewis, and other "Inklings" met at the Oxford pub to discuss the now legendary fantasy stories they were writing.

A clock designed to run with perfect accuracy for 10,000 years.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.