At the Earth's Core

The name of this movie is At the Earth's Core released in 1976-07-01 and it's main theme is A huge burrowing machine tunnels out of control at ferocious speed, cutting clean through to the center of the earth, to the twilight world of pellucidar. Once there, Dr. Perry and David Innes are threatened by half human creatures, lizard-like birds, and man-eating plants..