Al Rahmah Mosque appears to "float" atop the Red Sea.

This former Portuguese defensive fort atop a hill was occupied for thousands of years.

This 900-year-old mosque was restored using traditional techniques and materials.

Parts of this palace are upheld by merely palm stems or reeds supported by palm tree beams.

These desert alfalfa farms redefine the meaning of crop circles.

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

This tower has survived the times despite being composed of mud and camel hair.

A network of tunnels runs underneath the buildings of this ancient village.

A 900-year-old village located in the highland of the Asir region that features historic architecture.

Climbing the "mountain of frustration" is no easy feat.

The rocks around this mountain are filled with so many carvings that the area became known as the "open library."

A phenomenon that appears to make gravity work in reverse has been attributed to jinn, supernatural spirits from Arabian folklore.

It's believed human settlements from the Palaeolithic Age were established not far from this canyon.

In the middle of a barren desert, a massive, solitary rocky thumb juts out.

Abandoned station along an ancient pilgrimage route.

An annual two-week festival near the city of Riyadh when Saudis let their hair down.

A historic structure that once housed pigeons used by farmers to help fertilize farmland.

This fortress sits atop a centuries-old well system.

Lions carved into the rockface adorn these two tombs built into the mountains of Dadan.

Once a major stop on the Hejaz Railway, this desert station (complete with steam locomotive) has been abandoned for decades.

This mesmerizing, colorful structure looks like a tent made from stained glass.

These towering cliffs jut dramatically from the middle of a barren desert.

A 19th-century fortress and collection of artifacts offer a tour of Saudi history.

Within the Saudi Arabian desert lies a 2,000-year-old ghost town made of stone and mud.