Roman-era ships unearthed...

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

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

Ancient ruins hidden underneath a modern luxury hotel.

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

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

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

The mystic whose incorrupt corpse still attracts the faithful.

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

A modern sliver of architecture in Roma.

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

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

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

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

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

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

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

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

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

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

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

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

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

An abandoned Roman salami factory has found new life as an art space home to 200 squatters.