Join the show as it braves the Peruvian Amazon in search of the ancient civilization of Chavin de Huantar. There, he'll explore the secrets of a real 3,000-year old temple of doom. Complete with sacred idols and bizarre rituals, the temple was at the heart of an ancient cult that controlled society - not by war or force - but through mind control and hallucinogenic plants like the San Pedro cactus. To investigate this civilization, Josh goes croc hunting in the Amazon; crawls through the deep, dark tunnels of the mysterious temple; and finds out just how potent the San Pedro cactus was in the cult of Chavin.