1971 Mexican film by José Estrada

Mike, a Hemingway-esque adventure novelist, is spending his days in a self-imposed exile somewhere in Central America. A reporter for Sight Magazine, Katie, has tracked him down in the hope of getting the biggest scoop of her career. Mike falls for Katie. On a flight to Mexico City, their plane crashes near a remote hideaway of Nazi war criminals in hiding. The Nazis want to stay hidden and plan to dispose of their new guests

An American cowboy living in Mexico discovers his cattle is being eaten by a giant prehistoric dinosaur.