At 3500 meters above sea level, the cyclopean fortress of Sacsayhuamán dominates the city of Cuzco. With its three monolithic ramparts in the shape of saw teeth, this “Maginot Line” of the Incas “overshadows the pyramids on the Nile ...” (Tirso de Molina, 1583-1648). Some of these blocks of this giant puzzle, set like gemstones by unknown and great jewelers, are 9 meters high, 4 meters thick and weigh more than 350 tons! - 1969