This curious, round temple is the oldest still-standing marble building in Rome.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

This ancient market is often referred to as the oldest shopping mall in the world.

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

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

This large, circular tomb is the final resting place of the first emperor of Rome.

Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.

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

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

Rome's semi-secret peephole vista is also a former Crusader stronghold.

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

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

A remote and slightly overgrown park filled with replicas of world landmarks.

A flight of this "ghost staircase" has 40 steps on the way up, but only 39 steps on the way down.

A small Japanese village claims to be the final resting place of the son of God (and God's other son's ear).

The third-tallest statue in the world depicts the "Buddha of Infinite Light," complete with observation deck in his chest.

Inside the columbarium, thousands of colorful, high-tech Buddhas guard the ashes of the dead.

The largest of the Fuji Five Lakes is home to an impressive swan population—some real, some with paddles, and one with an observation deck.

People from around the world visit the shrine of Japan’s legendarily loyal dog.

A King Kong-like gorilla hangs from the top of this commercial building in Tokyo.

Giant animal sculptures are created with the rice straw leftover from the fall harvest each year.

Giant sand sculptures of famous people and places are on display near the Tottori sand dunes.

This little replica of Lady Liberty provides a bit of NYC in a Japanese city.

The tallest bronze seated statue of the Buddha in Japan.