Limestone caves in the Cambodian countryside, once the site of genocide, now a place of peaceful beauty.

Massive series of 45 caves and over 51,000 sculptures carved from cliffsides in China.

An often-shuddersome journey into a low-tech, robotic themepark.

Even France's favorite aquatic son Jacques Cousteau, couldn't get to the bottom of it.

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

A cave covered with bizarre stalactites of cloth.

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

18m long sarcophagus of a constantly growing dead prophet.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

Church built on the site where the last tsar of Russia and his family were killed.

This gem-encrusted temple is said to contain some of the Buddha's hair which can make the deaf hear and the blind see.

A precariously perched golden rock defies gravity and brings pilgrims from across Myanmar.

Gigantic unfinished stupa and the world's 2nd largest bell.