The intricate geometry inside this Baroque-style dome was designed to create "terror of the human soul."

Fountain where visitors can earn a license to be mad.

According to local folklore, this Roman sepulcher was once a throne for the Devil.

A beautifully well-preserved ancient Roman villa.

Stare out over the lagoon and beyond from this 10th-century campanile on the island where the city of Venice began.

A local student's chance encounter with Keith Haring led to the creation of one of Europe's largest murals.

The pristine waters crossing this forest form a hidden waterfall among the dense vegetation.

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

This clifftop arch is a natural stunner.

The relics of dozens of martyrs are stored in a single chapel.

A tree that defies gravity grows in an ancient ruin.

The bones of some 7,000 soldiers killed in the historic Battle of Solferino are stored here.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

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

This serene, turquoise lake in an extraordinary nature reserve showcases a rare natural phenomenon.

The incorrupt tongue of the patron saint of lost things is venerated in this basilica.

A whale rib was used to advertise the store by the arch that offered exotic goods from far away.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

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

This natural gas vent certainly earns its name as the smallest volcano in Italy.

Centuries ago, red and white wine poured from the statue's breasts whenever a new Venetian ruler was elected.

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

An Italian vineyard invites religious pilgrims to stop by 24/7 to get their drink on, for free.

Cave shrine on Monte Pellegrino.