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

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

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

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

This ancient trail climbs the mountain where a Latin League cult worshipped Jupiter, its main deity.

St. Francesca Romana, patron saint of drivers, resides in the church she founded.

In the early Roman Empire, people deemed traitors and criminals were tossed to their deaths from this rock.

A burial vault located under Tiber Island in the middle of the Italian capital.

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

This gallery commissioned by Cardinal Spada is known for its magnificent optical illusion.

Roman-era ships unearthed...

This subterranean shrine beneath a bike rental store celebrates the iconic Italian scooter.

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

The studio built by fascists in the hopes of "reviving the film industry" with the occasional propaganda film opportunity thrown in.

This hydrochronometer was invented by a Dominican monk and is a prime feature in this garden.

Ancient ruins hidden underneath a modern luxury hotel.

The mystic whose incorrupt corpse still attracts the faithful.

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

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

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

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

An Italian ghost town that fought obscurity, until a mysterious illness brought it to its knees.

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.