Goofs: Revealing mistakes: Gwangi's apparent color changes several times over the course of the movie because there was so much animation to do that Harryhausen did not have enough time to do proper color testing.
(more) Trivia: Gustavo Rojo is dubbed by Robert Rietty
(more) Filming Locations: Almería, Andalucía, Spain
(more) Quotes: Tia Zorina: He who takes from Gwangi the evil one is cursed.
Carlos: Only by an old woman's tongue.
Tia Zorina: I tell you, if he does not go back to the forbidden vally we shall all suffer a terrible fate. My eyes are blind but I can still see the signs.
Carlos: Keep your superstitions to yourself, old woman.
Tia Zorina: Fool! One day he will learn to obey the law of Gwangi, or like his brother he will perish!
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