In Peru, Quechua villagers revive the astonishing engineering lore of their Inca ancestors as they weave a traditional bridge from grass fiber and suspend it across a gorge. Meanwhile, an architect and an amateur archaeologist try to settle their long-standing arguments about the secrets of Inca stone walls. How did the ancient masons fit giant, irregular blocks together so perfectly that a knife blade cannot be pushed between the joints? As they join our experts in puzzling over Inca mysteries, NOVA viewers will glimpse the splendors of Machu Picchu and masterpieces of ancient Peruvian weaving and gold work.
