Release Message:  A Victorian era scientist (Doug McClure) and his assistant take a test run in their Iron Mole drilling machine and end up in a strange underground labyrinth ruled by a species of giant telepathic bird and full of prehistoric monsters and cavemen.

Description:  A Victorian era scientist and his assistant take a test run in their Iron Mole drilling machine and end up in a strange underground labyrinth ruled by a species of giant telepathic bird and full of prehistoric monsters and cavemen.