Stars James Mason, Pat Boone, Arlene Dahl and Diane Baker. The Jules Verne tale of a professor and his student that have an incredible journey. Deep in the bowels of the earth another world unaffected for millions of years exists. So vast, it has a luminous sky, trees and mountains. But here there be dinosaurs too! Or, at last one of the best jobs of acting done by lizards! Fun stuff for everyone who is still a kid at heart and James Mason is always a treat.