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.

• DirectorJim O'Connolly
• Release24 July 1969
• Genre
  Fantasy / Science Fiction
• Duration1h 36m
• Budget?
• Revenue?
• Rate
  

  7.131
  149 reviews
• Productions

  Warner Bros.-Seven Arts