Home to what was once considered the largest gate in central Asia.

Prowl through this sprawling bazaar under a massive Soviet-era dome for delicious eats.

Where Stoddart and Connolly suffered in the infamous Bug Pit.

An underground world of gorgeous, palatial metro stations designed as a nuclear shelter complex.

An 18-meter-long sarcophagus of a constantly growing dead prophet.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

Light still pours into the ruins of this ancient Islamic observatory.

The Avenue of Mausolea is a series of grand palatial tombs.

Climb atop one of the world's longest and heaviest trains for an unbelievable journey across the Sahara Desert.

The world's largest ship graveyard is the product of decades of corruption.