A battle between nature and architecture in the Cambodian jungle.

A quick and simple solution to Cambodia's train woes.

5,000 skulls in memorial to those killed by the Khmer Rouge.

Khmer Rouge's high security prison.

Hundreds of Buddhas in a re-discovered Indonesian temple.

A Buddhist theme park brings you a Buddhist version of Hell.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

One of the largest caverns in the world has a maw large enough to stack cathedrals in.

A licentious look into Singapore's past, full of disorderly bric-a-brac and disreputable characters.

A museum glorifying the life of Stalin, located in the city of his birth.

Ancient rock-hewn town that witnessed key events of Georgian history.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

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

This Armenian monastery was carved out of cliffs and named after the spear used to stab Jesus.

A geological oddity topped with a 2,000-year-old pagan temple.

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

A geological bull's-eye visible from outer space.

While not Turkey's deepest underground city, this subterranean redoubt is the largest.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

The most famous location in China was home to whole dynasties worth of imperial rulers.

China's beehive-shaped pyramids house the remains of a lost kingdom.

A lush desert oasis in the shape of a narrow crescent.

17th century mosque for Shah Abbas' harem.

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