“In circa-1900 Mexico, T.J. Breckenridge, a beautiful cowgirl, hosts a wild west show that is struggling. Former boyfriend Tuck Kirby, working for Buffalo Bill’s wild west show, wants to buy out T.J., but T.J. has an ace she hopes will boost attendence at her show – a tiny horse. The tiny horse, however, comes from The Forbidden Valley and a convoy of gypsies demands the tiny horse be returned to the valley; the horse’s genesis is also known to a British paleontologist, Sir Horace Bromley, working in the nearby desert. T.J., her men, and Tuck eventually find The Forbidden Valley with Bromley, and encounter a litany of living dinosaurs. One, a belligerent Allosaurus, is known as Gwangi by the gypsies, and a running pursuit sidetracks into a bloody battle with a styracosaur and eventually to terror in the outside town.” – imdb
La misma premisa de King Kong con una producción mucho más reducida y una dirección pobre, como toda Serie B tiene errores tremendos en continuidad, escala, actuaciones malas etc etc. sin embargol agenialidad del maestro de la animación Stop Motion Ray Harryhausen hacen que esta pelicula se convierta en un clásico instantaneo con escenas memorables.
It may not hold up quite as well as it did when I was a child, due in large part to James O'Connolly's fairly sloppy direction in the first half. But the absurdly inspired pairing of cowboys and dinosaurs and the quality of Ray Harryhausen's stop-motion effects sees it through to some genuinely exciting B-movie action set pieces. Despite its flaws, a cult classic.