An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

Psychoanalyst Carl Jung reported a paranormal experience after visiting this mosaic-lined Roman baptistry.

An incredible mosaic-lined monument said to have held the remains of an ancient Roman empress.

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

The remains of an ancient Roman city are hidden underneath Bologna's beautiful public library.

A small Byzantine church lost in the middle of the mountains of southern Italy.

A medieval, mosaic-lined baptistry built by a heretical Christian sect.

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

The roof of this ancient mausoleum is made from a single Istrian stone weighing a massive 230 tons.

The world's largest "Christmas tree" is illuminated by hundreds of lights stretching 2,000 feet up the slope of Mount Ingino.

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

A 2,000-year-old engineering wonder hides beneath an Italian town.

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

This 6th-century church has the largest and best-preserved collection of Byzantine mosaics outside Constantinople.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

This breathtaking monastery was established by Saint Benedict himself 1,500 years ago.

A military museum, art park, mausoleum, and architectural oddity all on one fascist's estate.

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

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

During World War II, this rice mill became a Nazi concentration camp.

The walls and streets of the ancient city are peppered with penises.

Now an entertainment complex, the Lingotto building was once an avant-garde auto factory with a test track on the roof.

What looks like a link in Gondor's early warning system is actually a centuries-old Italian fortress.

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