The Cyclops is a 1957 monster movie. Like The Beast of Hollow Mountain it takes place in Mexico, but The Cyclops is not an ancient creature but a radioactivity-warped giant. TCM has a page with a detailed plot synopsis. Lon Chaney, Jr. is in this movie. Gloria Talbott also stars. I remember her best from We're No Angels. Paul Frees does special voice effects.
10/1/2009: Great Old Movies likes it.