The initial plan for the movie envisaged all out-door filming taking place on the 20th Century Fox ranch property, but this proved impractical. Instead, filming was relocated to begin in Utah and later move to the ranch and the studio sound stage.[1] The scenes where the spaceship crash-lands in the lake were filmed at Lake Powell, which is formed by a dam on the Colorado River on the Utah-Arizona border.[2] The final shooting script for the movie pinpoints some of the locations that had been se