National Geographic : 1938 Feb
Photograph by Martin Chambi J. "THE SEAT OF THE INCAS" OVERLOOKS THE MASSIVE STONE WALLS OFSACSAHUAMAN Tradition says that seated upon the rock from which this picture was taken the ruling Inca used to watch the building ofthecitadel. The rock's smooth side (lower left) forms a natural slide for modern Indian boys. The zigzag walls of the fortress enabled defenders tocatch attackers inacross fire.