"The Flying Serpent" (1946)
The movie's opening shot, above, includes some real-world Iverson features at the bottom of the frame, incorporated into a fake Aztec setting via a superimposed backdrop at the top of the frame. I've pinpointed some of the key elements of the shot in the photo below.
The Wall, a massive rock feature at Iverson that clearly never moved — until it was destroyed after the filming days so that condos could be built in its place. The Wall is barely noticeable in the above shot, but it's there, and Potato Rock, which sat on top of The Wall, helps identify it.
Devil's Doorway rock features at the bottom of the frame, and another set of Aztec buildings superimposed at the top.
The movie also has a fun scene in which Quetzalcoatl flies down from Tower Rock in Iverson's Garden of the Gods and attacks a guy. For the most part, shots of the deadly serpent in flight appear to have been filmed in and around Bronson Canyon, including just before Quetzalcoatl shows up in Garden of the Gods in the clip below. Check out the clip: