One of the oldest and largest castles in the world.

A patchwork of ruins from various civilizations in one of the world's oldest continually inhabited cities.

A monumental underground karstic wonderland is also the water source for over a million citizens of Beirut.

This dome-shaped mountain boasts amazing views and has a rich religious history.

Built by a king and rebuilt by an emperor, this aqueduct transported water for 1,200 years to this ancient Mediterranean hub.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

The Dead Sea Scrolls were discovered in the ruins of this ancient monastic community.

After over 100 years out of service this landmark windmill once again turns as a symbol of Jerusalem's self-sufficiency.

The only quarter of the Old City not dedicated to a major world religion.

A "miracle" that seems to produce more holy fistfights than holy revelations.

A massive, heart-shaped, wind-carved crater in the middle of the Israeli desert.

For centuries, Jeddah’s old town was a major trading port and a point of entry for Hajj pilgrims traveling by sea.

This fountain pays homage to Qatar's history of pearling, the primary industry before oil.

This seemingly random 30-foot statue of an oryx in Qatar's capital was a mascot for the 2006 Asian Games.

Qatar's oldest market can trace its origins back more than a century.

The building is a gigantic piece of art inspired by the shape of a desert rose.

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

This beautifully restored fortification kept the city safe for centuries.

An imposing Omani fortress surrounded by date palm trees.

This bazaar is one of the oldest in the Arabian world.

These gnarly desert trees produce the prized aromatic resin traded along the ancient incense trail.

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

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

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