Angkor Wat in Cambodia is the world’s largest temple, but why did the Khmer civilization build this enormous Hindu shrine in the middle of the jungle? Laser technology reveals the astonishing truth: Angkor Wat was the centre of a long-lost megacity and the beating heart of a mighty empire.

Archaeologists hack through the jungle to reveal this sprawling metropolis and unearth how it thrived on the trade of rare iron. Blowing the temple apart exposes how water was the key to its success and how it’s secret true purpose may have been as a resurrection machine for a godlike King.