Reaching the "Church in the Sky" requires scaling the cliff face of a sandstone pinnacle with a 650-foot drop.

Ethiopia's "smoking mountain" is in one of the hottest regions on the planet and is home to two lava lakes.

An Ethiopian "Jerusalem" featuring a church hewn out of a single rock.

An otherworldly restaurant perched on the edge of a jagged cliff next to a medieval holy city.

A hyper-remote desert cave dramatized in "The English Patient."

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.

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.

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

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

A strange aquarium with stuffed fish, and almost no water for them to swim in.

Located near Cairo's El Korba district, the abandoned mansion continues to inspire mystery and rumor throughout the city.

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

It might not be the prettiest pyramid in Egypt, but it may be the muddiest.

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

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

This unassuming tree stump reportedly traces its roots to the famous pharaoh queen's reign.

Charnel house at the foot of Mount Sinai.

The forgotten mummies of Dakhla oasis.

Ancient Egyptian relief, claimed to depict an electrical light.

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

Brightly painted boulders scattered throughout the Sinai Desert.

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

The largest known Ancient Egyptian obelisk.