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.
1976
HD
90min
PG
United Kingdom
English
Kevin Connor
Caroline Munro
Peter Cushing
Cy Grant
Doug McClure
Keith Barron
Sean Lynch
Godfrey James
Helen Gill
Robert Gillespie
based on novel or book
monster
quicksand
cave woman
cavern
subterranean
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