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

Giant pigeon houses packed into city streets in Egypt.

Slum Settlement Filled With Mountains of Garbage.

A huge museum of much more than just agriculture displayed in a princess's palace.

Source for a sizable portion of Egypt's freshwater supply is more than an optical illusion.

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

A network of ancient Egyptian tombs built into the cliff face along the Nile.

Ancient Egyptian relief, claimed to depict an electrical light.

The forgotten mummies of Dakhla oasis.

One of its engravings is believed to be among the first representations of medical and surgical instruments.

Even King Tut was intrigued by the glass of the Great Sand Sea.

Egyptian treasure trove of fossils documenting the whale's transition from land mammal to sea creature.

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

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

An endless sea of white conical domes.

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.

Ozymandias’ time-keeping temple.

An ancient instrument used to measure the waters of the Nile so Egyptian farmers would know whether to expect famine or flood.

A collection of items from a way of life that no longer exists.

The social hall of this former factory is a Communist-era time capsule.

A spectacular Bulgarian cave resembling a devil's head with a waterfall rushing down its throat.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.