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

Believed to be the remains of the lost Temple of Minerva, this nymphaeum has been known by its misnomer to this day.

These hut foundations are believed to be the residence of Romulus, founder of Rome.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

This is the oldest Roman-made bridge in the city still existing in its original state.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

A colossal aqueduct from the second century B.C., deeply hidden in a gorge on the outskirts of Rome.

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

An ancient Roman temple first dedicated to an emperor's wife is now a church.

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

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

Known for centuries as the famous Roman emperor's burial place, this monument is actually something else.

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

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

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

An 18th century fountain and two columns are all that remains of Rome's forgotten river harbor.

A fortified medieval basilica on the Caelian Hill preserves extraordinary frescoes and one of Rome's most beautiful hidden cloisters.

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

Its interior is adorned with some of the best examples of early Christian mosaics.

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

A sculpture serving as an homage to Pope John Paul II.

Remnants of a 4th-century church with vivid medieval frescoes and ancient sarcophagi hide beneath this old basilica.

This park on the outskirts of Rome boasts two ancient Roman aqueducts and a medieval tower.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.