Secret of the Incas Secret of the Incas Secret of the Incas is a 1954 adventure film starring Charlton Heston as adventurer Harry Steele, on the trail of an ancient Incan artifact. Shot on location at Machu Picchu in Peru, the film is often credited as the inspiration for "Raiders of the Lost Ark". The supporting cast features Robert Young, Nicole Maurey and Thomas Mitchell, as well as a rare film appearance by Peruvian singer Yma Sumac. American adventurer Harry Steele (Charlton Heston) earns a living as a tourist guide in Cusco, Peru but plans to make his fortune by finding the Sunburst, an
Machu Picchu prevent it from running down the mountain. Similar layering protected the large city center from flooding. Multiple canals and reserves provide water throughout the city that could be supplied to the terraces for irrigation and to prevent erosion and flooding. The Incas never used wheels in a practical way, although their use in toys shows that they knew the principle. The use of wheels in engineering may have been limited due to the lack of strong draft animals, steep terrain and dense vegetation. The approach to moving and placing the enormous stones remains uncertain, probably involving hundreds of men to