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

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

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

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

Architectural monsters are devouring this palace's every door and window.

This unassuming bridge is most likely one of Michelangelo's unfinished masterworks.

An expansive collection donated by an heirless nobleman formed this admission-free civic museum.

A small but very fascinating fountain in the center of Rome with four books and a deer carved.

This hidden alley near the location of Rome's first theater was the site of a curious miracle.

Inside this building is another country within Rome, a sovereign entity without a physical territory.

A never-finished memorial to the heroes of the Napoleonic War has become "Scotland's Folly."

The remains of this 2nd-century Roman temple are incorporated into a modern building.

These hut foundations are believed to be the residence of Romulus, founder of Rome.

In Rome’s Jewish ghetto, a 200-year-old bakery still makes the neighborhood’s historic sweets.

A small cell adjacent to this church was once the bedroom for a renowned saint.

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

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

The final resting place of the poets Shelley and Keats.

Rome’s legendary peephole vista is also a former Crusader stronghold.

The best preserved Paleochristian basilica in Rome hides a number of oddities and 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 ancient Roman arch misled treasure hunters for centuries.

This medieval church in Rome was almost destroyed following a terrorist attack in 1993.

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