In 1858, a young French naturalist, Henri Mouhot, set out to discover new animal species in Southeast Asia. Instead, he stumbled on the lost city of Angkor. Uncovering temple after temple hidden by jungle, Mouhot wrote a stirring account of Asia's most bewitching and romantic ruins, sparking an explosion of interest around the world.

A Chinese monk's description of oasis cities during a 7th Century pilgrimage would prove invaluable to another explorer more than 1000 years later. Sir Aurel Stein found cities buried in sand and a 1000 year-old Buddhist library in near-perfect condition.