The Valley of Gwangi

Cowboys Battle Monsters in the Lost World of Forbidden Valley.

A turn of the century wild west show struggling to make a living in Mexico comes into the possession of a tiny prehistoric horse. This leads to an expedition to the Forbidden Valley where they discover living dinosaurs. They capture one and take it back to be put on display, leading to inevitable mayhem.

starring James Franciscus, Gila Golan, Richard Carlson, Laurence Naismith