A unique urban square characterized by raw concrete structures and bold geometric forms.

An abandoned quarry hides an open-air gallery of huge sculptures, some made from the rubble of 9/11.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

Skulls and skeletons are omnipresent in this church dedicated to souls trapped in purgatory.

A dead saint, a deadly poison, and a mysterious holy ooze.

The world's most active stratovolcano is almost always erupting.

A mysterious ancient elephant said to possess magic powers is now the symbol of a Sicilian city.

Cave shrine on Monte Pellegrino.

This skeletal, unfinished Gothic church once housed a miraculous masterpiece by Raphael.

An abandoned shopping gallery built during Fascist Italy tucked in the center of Palermo.

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

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

Why a column on the entrance is inscribed with a verse from the Quran is one of Sicily's many mysteries.

This uncanny fresco celebrating the "triumph of death" was split into four pieces to be moved to another museum.

This unique museum is home to over 5,000 puppets of all types.

Haunting graffiti left by prisoners of the Spanish Inquisition.

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

A study of Fascist era Art Deco design in Italy.

This Arabesque Italian castle was built with a primitive, if ingenious, air-conditioning system.

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

A plaque honoring a Hungarian hero of Italy is hidden in plain sight in Palermo.

One of the largest squares in Europe contains an entire artificial island.

Something's missing between the arcades of the Palazzo della Ragione in "the city of the three withouts."

A freedman baker’s lavish tomb has a relief showing various stages of Roman bread making.