Tarzan and the Space God

Tarzan saves a man named Professor Robert Ragsdale when his plane crashes into a river during a thunderstorm. Tarzan learns from Professor Ragsdale that a watery area in the shape of the Mayan God Kukulkhan is suspected to be where the Mayans disappeared to enabling Tarzan to have Jad-bal-ja lead them to the lost city where the Cheechineeta Tribe lives. They find some robots working for the Mayans who worship a high priest who claims to be Kukulkhan when in fact that he is actually an alien from another planet.