This 7th-century monastery was sacked by Saladin.

This North African stone complex is considered to be the oldest astronomical observatory on Earth.

Giant pigeon houses packed into city streets in Egypt.

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

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

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

Some believe that this ancient mural depicts technology far ahead of its time, but in reality it's nothing quite out of place.

Ancient Egyptian relief, claimed to depict an electrical light.

Brightly painted boulders scattered throughout the Sinai Desert.

The largest known Ancient Egyptian obelisk.

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

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

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.

An alien landscape of chalk-rock in the Egyptian desert.

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.

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

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The shockingly unspoiled Peruvian tomb of the Lord of Sipan was once guarded by a footless warrior.

The large collection of pre-Columbian pottery might make you blush.

Surrounded by low rise buildings and partially converted into an auto body shop, this marble archway is the only vestige of a forgotten Manhattan estate.