A whimsical bridge adorned with decorative dragons.

This massive subterranean fissure is known as the "underground Grand Canyon."

This one-time health resort was used by aristocrats around the world.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

The studio built by fascists in the hopes of "reviving the film industry" with the occasional propaganda film opportunity thrown in.

A stunning bridge that appears as if it's lunging to the shore, and has a legend of a devilish architect.

An Italian geologic wonder that served as the inspiration for the landscape of Dante's hell.

A lover's walk between hilltop towns, decorated with graffiti love notes.

These gutted monastery ruins still stand proudly in the middle of the Italian countryside.

This Italian foot path winds through the mountains via 52 individual tunnels.

Pilgrimage site for star-crossed lovers.

The bomb-ravaged remains of of a colossal Neptune.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

Fountain where visitors can earn a license to be mad.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

Regency-era excess on the English Coast.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

Home to three historic ships from the age of Vikings.

Metro station with a claim to rock n' roll fame.

France's most famous cemetery, with some of its most curious tombs.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Macabre astrological automaton clock dating to the late 1400s.

Go inside to really appreciate this 500-year-old technological masterpiece.