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

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

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

Featuring the last fully walkable parapet walkway in Europe.

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

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

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

Known as the Royal Palace of the Euganean Hills, this often overlooked castle has been home for multiple noble families over the centuries.

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

When this funny little building went up in the 19th century, most people thought it would simply fall over.

On the shores of Lake Garda, the ruins of a Roman villa that allegedly belonged to the poet Catullus.

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

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

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

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

This cathedral hides a sculpted dog that determines your fate and an unexploded shell from World War II.

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

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

This poignant art installation raises awareness of violence against women.

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

It’s said this crypt was the setting for the tragic finale of the Shakespeare play.

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

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