This ancient structure is widely thought to be the oldest intact pyramid in the world.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

Known as the Sistine Chapel of Egypt, this tomb houses some of the most well-preserved paintings in Egypt.

One of the most well-preserved temples of ancient Egypt.

An endless sea of white conical domes.

Ozymandias’ time-keeping temple.

Part shoe store, part sociopolitical art gallery, part zoo.

The medieval center of the Islamic world was also once the seat of Saladin's sultanate.

Standing atop 2nd-century Roman ruins, this church is one of the oldest and most iconic in Old Cairo.

Haunting graffiti left by prisoners of the Spanish Inquisition.

A fairytale-like medieval church perched atop a rocky cliff on Italy's "Coast of the Gods."

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

A cave in southern Italy adorned with thousand-year-old Biblical frescoes existed in obscurity until fairly recently.

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

Beautiful views and Roman-style statues on the Italian coast.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

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

This Neapolitan exhibition hall grants weird and wonderful insight into the intricacies of human biology.

An unusual "skull with ears" sits in the crypt of this small church tucked away at the end of a narrow alley.

The remains of the left arm of the levitating philosopher-saint are kept in a 13th-century Neapolitan basilica.

An eerie, little-known Neapolitan museum filled with preserved human remains.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

The Neapolitan Cult of the Dead still cares for the skulls at this mini-Fontanelle.

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