What are some of the best monster/creature movies?

beast from 20,000 feet. made in the 50s. really good movie, jurassic park movies. land that time forgot 1975, there was a sequel or remake in 2009. night of the living dead 1968 and 1990. dawn of the dead 1978 and 2004. amc the walking dead. returns this oct. zombieland, reign of fire. predator movies something of a reptile face.