Secret of the Incas shot in Peru before. Wendell Corey was originally announced as star. In July 1953 Paramount took over Hal Wallis' contract with Charlton Heston and announced he would make the film after he finished "The Naked Jungle". "Secret of the Incas" was filmed on location in Peru at Cuzco and Machu Picchu, the first time that a major Hollywood studio filmed at this archeological site. A sixteen person unit including Heston, producer Mel Epstein and director Jerry Hopper spent a month filming footage in Peru in 1953. Five hundred indigenous people were used as extras in the film. The film also
Machu Picchu who performed heavy physical labor (such as the Mit'a) and/or served in the Inca military. Not only people were suspected to have immigrated to Machu Picchu, there were several animal bones found that were not native to the site. Most animal bones found were from llamas and alpacas. These animals naturally live in altitudes of 14000 ft above sea level rather than the mere 8000 ft Machu Picchu rests on. Most likely, these animals were brought in from the Puna region for meat consumption and for their pelts. Guinea pigs were also found at the site in special burial caves,