Five candy-colored villages on the Italian Riviera.

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

Fortified medieval tower house with lovely roof garden.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

Ancient snack bar of the Roman Empire re-opened.

Erotic art covers the walls of the largest ancient pleasure palace.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The world's most active stratovolcano is almost always erupting.

Italian cave with exceptional acoustics and an unsavory history.

142 ceramic steps become a mosaic once a year.

Every inch of this chapel is covered in craftsmanship from across the world.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

The only castle in North America to ever house European sovereigns.

A museum in the former home of Marxist revolutionary Leon Trotsky.

Frida Kahlo's childhood home, now a museum of her life and works.

The ruins of an ancient city built by Mayan traders is centered around a temple of a sacred feathered serpent deity.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

The splendor of this 17th century golden chapel has led it to be called the "eighth wonder of the world."

This historic, palatial theater is now one of the world’s most beautiful bookstores.

Prehistoric history as seen through the lens of an outsider artist.

After the Cuban Revolution, the famous rum company had to leave their swanky headquarters behind.