Documentary that narrates the conception and production in Spain of «The Valley of Gwangi» by Ray Harryhausen. Documentary that narrates the conception and production in Spain of «The Valley of Gwangi» by Ray Harryhausen. Documentary that narrates the conception and production in Spain of «The Valley of Gwangi» by Ray Harryhausen. Documentary that narrates the conception and production in Spain of «The Valley of Gwangi» by Ray Harryhausen.