A massive work of modern art that appears to be a crop circle in the middle of the desert.

Brightly painted boulders scattered throughout the Sinai Desert.

9th century Abbasid mosque, damaged in modern warfare.

Mysterious lost empire of the Silk Road.

An ancient church on a tiny island covered in stone bible stories has controversially been turned into a museum.

A bloody history is captured in this former prison turned museum.

Modern-day cave dwellers carve elaborate homes out of volcanic debris.

Salt cured mummies continue to turn up in this Iranian mine.

Mirrors and glass shards cover every inch of this arrestingly beautiful mosque.

The palace of the King of Kings, burned by Alexander the Great.

Putrefaction plateaus in Iran, where the dead were sent for decontamination before going to their final resting place.

These little castles each held thousands of pigeons.

Spring that emits water and fire at the same time is said to have remedial properties, and sparked its own religion.

This cavernous swimming spot doubles as a home to the largest known colony of bats in Central Asia.

Lunar landscape, a mud volcano and bizarre rock formations.

Once an impressive link to Afghanistan’s Buddhist past, now a sad reminder of intolerance towards other cultures.

The world's largest natural arch was forgotten for over 50 years after its discovery.

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.

Former island in the Aral Sea used to be a top-secret Russian bio-weapons facility.

A fiery crater has been burning in the Karakum Desert since 1971.

These "50 Fortresses" have been unearthed in the ancient oasis of Khwarezm.

Time capsule of a museum, in which the Soviet Union remains alive and kicking.

Rusting ships sit in a desert where a sea used to be.

World's oldest and largest space launch facility, once a secret missile testing site.