History's Greatest Mysteries S5E8 · The Mystery of Machu Picchu

History's Greatest Mysteries

Season 5 · Episode 8 · The Mystery of Machu Picchu · 42 min

With 500-year-old secrets hidden in skeletons and stone, Machu Picchu is one of the most puzzling archaeological sites on earth. It's among the ancient world's most enduring riddles: Who built this astonishing complex, and why?