City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

Its columns were all carved from the same white oak tree.

A guitar mounted on a wall in Temple Bar honors the Irish musician.

The final resting place of the poets Shelley and Keats.

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

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

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

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

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

A massive marble foot is tucked away in a small alley near the Pantheon.

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

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

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

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

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

Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

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

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

Make a tough dinner decision: Octopus wasabi roulette or bull penis?

A museum designed by and dedicated to P.T. Barnum in the town where he is buried.