A fortified medieval basilica on the Caelian Hill preserves extraordinary frescoes and one of Rome's most beautiful hidden cloisters.

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

A statue representing a lost Roman profession that was vandalized for centuries.

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

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

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

Crispy, cheesy rice balls—the Roman answer to arancini—take center stage here.

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

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.

A rare example of a medieval house in Rome adorned with a melancholic inscription.

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

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

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

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

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

Plaques on its facade commemorate the Tiber's most destructive deluges.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

A remarkable example of small town medieval architecture that showcases the wealth and importance of a 16th-century wool town.

An unusual artwork dedicated to a unique man that entertained people visiting Cambridge while raising money for charity.

This meticulously reconstructed early medieval settlement offers an immersive experience of daily life in an Anglo-Saxon community.

This sprawling, Brutalist estate feels like a city within a city.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.