In 1976, Scottish engineer Stan Hall organised a landmark expedition to the caves of the Tayos Indians in Ecuador, involving a dozen institutions, joint Special Forces, and astronaut professor Neil Armstrong as Honorary President and participant. Hall was driven by curiosity about Erich von Däniken's report of a Metal Library allegedly found in the caves by investigator Juan Moricz in the mid-1960s (published in von Däniken's 1972 blockbuster Gold of the Gods). This idea was considered unorthodox in the absence of any ancient written script in South America. In Hall's odyssey into the heart of global enigmas he researches: The origins of mankind; Atlantis; Ptolemy's lost city of Cattigara; The sudden rise and fall of wonder civilisations. This journey ended with his identification of Atlantis and Cattigara, and the entrance to the Metal Library along the Pastaza River in Ecuador. Imagination, action and danger combine explosively in the story of this spectacular British-Ecuadorian expedition to the Tayos Caves of Ecuador.