Miles of man-made caves and tunnels are currently used for cultivating mushrooms.

Elaborate patterns adorn the city's disappearing traditional architecture.

A mesmerizing reservoir nestled at the heart of a pre-Islamic Yemeni village.

A city built from mud and known as the "Manhattan of the desert."

The most alien-looking place on Earth.

An abandoned desert hamlet swallowed up by sand.

This mysterious cliffside carving of an ancient Hittite deity has baffled scholars for centuries.

A charming beach town in Turkey captures all the colors of the rainbow.

The ancient abodes are a testament to human ingenuity amid harsh climates.

Standing proud atop a Turkish bluff, this Ottoman palace has retained its grandeur despite being abandoned for centuries.

The ornate miniature mansions were built for Istanbul's feathered residents.

Naturally protected city carved from a rock face.

A Lycian city of the dead carved into the hillside of Southern Turkey, complete with startlingly human touches.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Mysterious lost empire of the Silk Road.

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

More than 100 monumental tombs carved into rock are preserved at this ancient Nabataean site in the Arabian Desert.

An unfinished tomb carved into a giant boulder in the Arabian Desert.

This unconventionally beautiful landscape possesses stunning scenery you won't easily forget.

Some of the ancient-looking huts among these strange rock formations aren't ancient at all, but built as part of a movie set.

This cascade of mineral-rich hot springs and waterfalls is an oasis in the Jordanian desert.

Just outside of Jordan's capital lies an ancient castle and intriguing caves dating back to the Copper Age.

A more chill but no less fascinating version of the famous ancient archeological site.

An ancient capital city that dates back 3,000 years old and harbors many surprises.