Adventure!

 

 (imdb)

ADVENTURE IN THE CENTER OF THE EARTH-1965-This made in Mexico adventure starts off with a family group taking a tour of some caves. A woman Julia (Carmen Molina) and her fiance sneak off for some hanky panky. They fall down a hole. Just when it seems like they will be rescued the man is killed by a monster but we only see its claw. It leaves a footprint that later gets Prof. Diaz (Jose Elias Moreno) very excited. He thinks it's a great discovery and wants to hear what the woman has to say. Unfortunately she's in shock. They try to get through to her but fail. The professor decides to check out the cave himself. He assembles a group to explore. Once they set up camp one of them croons a song. Later a female photographer is attacked by a one eyed creature. Still later a winged creature with fangs kills most of the party and kidnaps one woman. 

This low budget production, directed by Alfredo B. Crevenna (who earlier made a bunch of movies featuring Santo) is pretty entertaining.

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