A unique clock tower in the garden of an elegant Victorian hall.

Historic medieval fortified city in southwest France.

A tiny island home to a former English slave fort.

Electrical pylon in the shape of Disney's beloved mouse.

After the attack on Pearl Harbor, rocks and fossils from every U.S. state were collected into a pyramid of national unity.

An icy lake tucked among jaw-dropping alpine panoramas.

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

The "Great Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

The yawning maw of this pagan visage is said to bite off the hands of liars.

A Nesting Doll of Churches.

Harlequin costumes, signed scripts, and armor-wearing puppets.

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

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

Architectural monsters are devouring this palace's every door and window.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

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

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 once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

Where Venice's gondolas go for a tune-up.

100 year tradition of fist fights, marked by marble footsteps.

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