An underground city of ancient quarry tunnels hid thousands of Allied soldiers in WWI.

A sublime medieval path adorns the marble floor of one of the most beautiful Gothic cathedrals in France.

The encased skull that is widely believed to belong to St. John the Baptist.

A centuries-old complex of hand-dug stone chambers has sheltered locals in times of trouble.

Science fiction's grandfather has a fittingly marvelous tomb.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

To the famous surrealist artist, liberty required two torches held high.

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

Located in the house where Gustave Flaubert was born, this odd museum has more to do with medical grotesquery than the Western novel.

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.

Bloodstains can still be seen in this medieval church where two medics saved lives on D-Day.

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

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

The birthplace of the ferocious William the Conqueror, this castle is awash in medieval history.

Personal garden filled with mosaics made of recycled garbage.

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

With over 340,000 artifacts and counting, there is something for everyone, often called the "Smithsonian of the West."

Eastern zen meets Western grit in these four little trees growing out of a rock on Lake Tahoe’s Nevada shore.

Beneath a Virginia City bar is the entrance to an abandoned gold mine.

A glimpse into the lives of the the Miwok and Paiute people in Yosemite National Park.

A shady solar power system that couldn't hold up to the harsh desert conditions.

This off-the-beaten-path abandoned town is a relic of Montana's silver mining boom.

World's largest collection of serial killer artwork and other macabre exhibits.

The world's first nuclear power plant is open to visitors looking to role-play a meltdown.