An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.

The ancient latrines of the Greeks, in all their public glory.

1513 Turkish world map, full of European state secrets and snarky commentary.

The most metal church of all time was built in record time because of an international, pious pissing contest.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

A marvel of Byzantine engineering under the streets of Istanbul.

Da Vinci's equestrian statue, 500 years in the making.

Small on the outside, big on the inside, this church is an astonishing act of visual deception.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

Charnel house at the foot of Mount Sinai.

In Egypt's expanding metro area, many of the neighbors are dead.

Slum Settlement Filled With Mountains of Garbage.

The massive cave church of Cairo's Zabbaleen community is one of the largest Christian churches in the Middle East.

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

The forgotten mummies of Dakhla oasis.

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

The city-sized home palace of one of ancient Egypt's most powerful rulers gives us a rare look into the lives of the epoch's rulers.

Ancient Egyptian relief, claimed to depict an electrical light.

Ancient snack bar of the Roman Empire re-opened.

Erotic art covers the walls of the largest ancient pleasure palace.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.