"Stairs of the Turks", a chalky white cliff eroded conveniently into stairs, allowing for easy pillaging.

This constantly evolving art space saved an Italian town from its own crippling reputation.

Cave shrine on Monte Pellegrino.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

Every inch of this chapel is covered in craftsmanship from across the world.

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.

This mosaic-lined medieval church was built by the world's first admiral and still holds mass in ancient Greek.

Italian cave with exceptional acoustics and an unsavory history.

A quiet Sicilian village is home to a cafe that had an important role in "The Godfather."

An eccentric home in Sicily turns heads on a regular basis.

A museum dedicated to one of Portugal's most celebrated writers.

This small church was constructed over the ruins of three temples dating to the Roman Republic.

This basilica is dedicated to two saints, one of which is known more for his famous quote.

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

An 18th-century post box used to alert the church of sick and ailing foreign pilgrims.

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

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

Rome's first modern graffito is all that is left of a peaceful protest from the 1970s.

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

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

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

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

Ancient ruins hidden underneath a modern luxury hotel.

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