The ruins of an ancient Zoroastrian Tower of Silence believed to be the earliest example of the traditional funerary practice.

One of the most ethnically diverse spots on the planet.

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

Final palace complex of the last of 29 Kokand rulers.

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

Ancient barriers wrap around what was once an important stop along the Silk Road.

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

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

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

This ancient village and its adjoining cemetery have a beautiful history of death and remembrance.

It's hard to believe the dizzying patterns covering this abandoned mine are completely natural.