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

This giant volcanic crater holds its very own field of salt.

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

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

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.

A massive collection of petroglyphs dating back some 40,000 years.

In oil-rich Azerbaijan, people bathe in the black stuff.

This mysterious but iconic tapered tower appears in many Azeri fairytales and legends.

Swirling layers of white and red rock earned these mountains their festive nickname.

A shrine of fire worship built on top of a natural flame.

In the foothills of the lesser Caucasus, a centuries-old fortress still stands.

Home to nearly a third of the world's mud volcanoes, Azerbaijan is home to a messy, bubbling, and sometimes explosive landscape.

Mysterious hillside with a continuously burning natural fire.

Destruction from Armenia's 1988 earthquake inspired an artist's sculptures of scrap metal.

Hundreds of intricately carved Armenian stone crosses can be found within this huge cemetery.

The observation point offers spectacular views of the ruins of an ancient Armenian capital.

Giant stone letters dedicated to the founder of Armenia's alphabet.

Nestled in a peaceful valley, this Armenian monastery may have been saved from Mongols thanks to the eyes of God.

This little medieval church hidden in the center of Yerevan was lost and rediscovered—twice.

This medieval manuscript collection has some of the most obscure and ancient texts in the world.

This ancient monastery complex was transformed from an island to a peninsula when the lake was partially drained.

The most visited pilgrimage site in Armenia once held a saint in a pit for 13 years.

This architecturally eclectic fortress witnessed centuries of bloody turmoil, including the massacre of its ruling clan.