This 6th-century church has the largest and best-preserved collection of Byzantine mosaics outside Constantinople.

An incredible mosaic-lined monument said to have held the remains of an ancient Roman empress.

Numerous stone coffins from different centuries, lined up in a sixth century basilica.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

This amazing medieval fortress stands atop a promontory along the famous Cinque Terre.

A lover's walk between hilltop towns, decorated with graffiti love notes.

Five candy-colored villages on the Italian Riviera.

The bomb-ravaged remains of of a colossal Neptune.

This medieval city gate is now a blend of the past and the modern world.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

Pompeii's less famous neighbor is still revealing her secrets.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

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

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

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

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

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

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

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

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

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

2300-year-old Roman road connecting the empire.

Rome's semi-secret peephole vista is also a former Crusader stronghold.