Goofs: Plot holes: Although a scientist in the laboratory explains the reason why bullets will not hurt Ymir because the beast has neither heart nor lungs, we see it's chest pop up and down like it is breathing.
(more) Trivia: Since he planned to use a real elephant for some of the footage in the zoo,
Ray Harryhausen asked for one that was 15 feet tall, but the film was only able to procure an eight-foot-tall one for him. In order to make the elephant look much bigger, a 4'6" actor was cast to play the zookeeper.
(more) Filming Locations: Rome, Lazio, Italy
(more) Quotes: Contino: Fascinating. Horrible, but fascinating.
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