The Beast From 20.000 Fathoms 1953

A ferocious dinosaur a Rhedosaurus awakened by an Arctic atomic test terrorizes the North Atlantic and, ultimately, New York City.
Based on a Ray Bradbury short story "The Fog Horn" this film was one of the inspirations for all the radioactive monsters including Godzilla. Stop motion animation by the legendary Ray Harryhausen. Also Lee Van Cleef as Corporal Jason Stone.