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. The final shooting script for the movie pinpoints some of the locations that had been selected for specific scenes; the crash site was to be filmed in Lake Powell at Lone Rock; the astronauts trek was to take place on 'ochre dunes', 'black dunes', 'gray area', 'crazy canyon' and 'wire grass canyon'.