The Valley of Gwangi (1969)

Set in the early 1900s, a struggling Wild West show in Mexico stumbles upon a miniature prehistoric horse, igniting a daring expedition to the legendary Forbidden Valley. There, they encounter a world of living dinosaurs, capturing one to showcase in their act. The thrill of their discovery quickly spirals into chaos as the creatures wreak havoc, turning their ambitious venture into a battle for survival. This adventure blends classic Western elements with thrilling prehistoric encounters, showcasing the consequences of tampering with nature.