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

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.

A magnificent waterfall is also home to the remains of a Roman hydraulic engineering system.

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

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

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

The ruins of an abbey believed to have been founded by Charlemagne in the 9th century.

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.

Ancient ruins hidden underneath a modern luxury hotel.

Charles Dickens was not a fan of the ghastly wall dressings in this 6th century church.

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

The best preserved Paleochristian basilica in Rome hides a number of oddities and secrets.

Roman-era ships unearthed...

This historic recreationist school churns out warriors that may very well have had a fighting chance in Rome's pits of the day.

A huge enchanting public park just outside the ancient walls of Rome.

One of the most important yet well-hidden museums dedicated to the history of medicine.

Rome's ancient Etruscan rival, now a park full of ruins.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

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

A modern sliver of architecture in Roma.

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

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

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

One of seven Jewish catacombs in Rome and one of only two open to the public.