The first Russian Orthodox church in the Catholic city of Rome in almost a thousand years.

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

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

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

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

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

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

The mystic whose incorrupt corpse still attracts the faithful.

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

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

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

Ancient ruins hidden underneath a modern luxury hotel.

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

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

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.

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

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.

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

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