This site was once the religious, cultural, and trade center of Sri Lanka.

This fort dates back to 1588 and was colonized by the Portuguese, Dutch, and English and sits prominently on the Indian Ocean where azure water lap the coast.

This elaborate temple was built around one of the Buddha's teeth.

Seven beautiful 1,000-year-old rock-cut Buddhist statues.

Once thought to be the Garden of Eden it holds a holy footprint claimed to belong to Adam, Buddha and Shiva.

Huge herds of Asian elephants can be seen walking, bathing, and just chilling at this Sri Lankan park.

An ancient stone fortress considered by many to be the eighth wonder of the world.

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

Witness traditional silk production in the Uzbek city that's been a hub of sericulture for over a thousand years.

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

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

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.

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

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

One of the world's oldest, it provides a livelihood for the entire community.

The private train station King Leopold II built for the Belgian royal family now lies abandoned.

The vast chamber inside this abandoned cooling tower looks like something out of a sci-fi dystopia.