This bridge over D.C.'s Rock Creek Park is sometimes called the "Buffalo Bridge" because of its four buffalo sculptures, which were cast from a single piece of bronze.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

Time travel with sweets across history at this research-based candy store.

This bakery sits on the site of the Black Panther Party's first headquarters.

A classically trained chef makes beloved burritos inside a gas station.

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

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

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

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

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

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

Architectureal fantasy quarter of Rome.

A rather vulgar example of the transition from Latin to the Italian vernacular.

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

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

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

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

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

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

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

According to local folklore, this Roman sepulcher was once a throne for the Devil.

A large replica of a monumental Roman inscription is located on the side of this museum.