Archaeologist Pauline Carroll travels to Cambodia to explore temple sites and discover lost cities. She visits the world's largest temple, Angkor Wat, and then travels to the Cambodian jungle to discover more about the roots of the Khmer Empire.

Pauline Carroll explores Cambodia, home of the ancient Khmer Empire. She learns about the empire's greatest king and how he established the world's first free national health service. She then visits a mysterious city that is still being uncovered.