Two young American tourists are hiking through northern England. Cold and tired, they stop in at a village pub, the Slaughtered Lamb. The village folk are circumspect and hostile, and the young men soon leave, having been warned to stay on the road and beware of the moon. The young men get in an animated conversation and wander into the moors, it starts to rain, and out comes the moon. Soon they are attacked by a mysterious creature, and horrific consequences ensue.
American Werewolf in London (another of my “missed classic” efforts) provided a nice blend of humor and horror, with good special effects. Entertaining throughout.