This impressive system of tanks was used to store drinking water as long as 2,000 years ago.

Yemen's "Stone Palace" looks like it was carved right out of the tall stone column on which it is built.

One of the most remote and isolated villages on the Arabian Peninsula.

The most alien-looking place on Earth.

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

This giant work of Cappadocian pottery includes a memorial for the artisan who created it.

A former salt mine is now a cool picnic spot for families and asthmatics.

A little-known caravanserai hidden among farmhouses in the Turkish countryside.

An underground network of massive stone arches and their skylit vaults support ruins of portico structures above.

This arch granting triumphal entrance into Antalya was designed to honor the emperor's visit.

One of the most exquisite Lycian hilltop citadels in Turkey.

These ruins once flourished as the capital of the Lydian kingdom, often credited with the invention of metal coinage.

This ancient subterranean megalopolis is known for the hot oil traps that were installed above each of its entrances.

Carvings in Turkey's Marble Road may have directed ancient Romans to a hidden brothel.

This hidden gem is bathed in beautiful natural light.

Climb a set of vertiginous stone steps to the top of this impressive ancient edifice.

This shuttered power plant is now Turkey's first industrial archaeology museum.

Seven early Christians were sealed into a cave where legend has it they slept unharmed for centuries.

At this ancient settlement at the foot of Mount Babadağ, honeycomb tombs are carved into a round cliff.

A mysterious ancient cemetery with Roman sarcophagi and Lycian inscriptions.

One of the largest wooden constructions in Europe was meant to be a casino, but soon became an orphanage.

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

The only residents of this abandoned housing development full of identical castles are stray cats and dogs.

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