Thousands of well-dressed mummies below a monastery.

A madman's personal garden filled with 1,000 sculpted heads.

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

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

Abandoned village in Sicily built during the agricultural reforms of Mussolini.

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

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

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

Bold black and white motifs of life and death add a dramatic flair to this 17th-century crypt.

A Spanish town built into the cliffs.

An eerie collection of the surviving structures from a past celebration of the future.

The final resting place of the great navigator, or maybe his brother.

The world's largest wooden structure.

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

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

Pilgrimage site for star-crossed lovers.

Pompeii's less famous neighbor is still revealing her secrets.

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

The final resting place of the poets Shelley and Keats.

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.