I remember one called "The Giant Behemoth", which was one of those "Dinosaurs returning to life in modern times" movies, and, I believe, a British production. It scared the daylights out of me, although "Behemoth" was a new word for me, and I was disappointed to find it wasn't about a giant moth. Also, looking back, I realize that "Giant Behemoth" is sort of redundant. Are there small behemoths?

And, although everyone I know has seen "The Crawling Eye", I somehow missed it. I hear the monster was pretty cheesy.