The Morlocks are a large community of Mutants who felt they were outcasts, living in the underground tunnels beneath New York City, New York, Gotham City, New Jersey, Metropolis, Delaware, Bridgeport, Connecticut and Chicago, Illinois.
These tunnels were built in the 1950s by the U.S. Government as shelters in case of a national emergency, and later abandoned. The vast majority of the public had no idea these tunnels existed. There were numerous tunnels stretching out of sight, many unexplored. The main tunnel was 50 feet high and ran the length of Manhattan. It called "the alley" by its inhabitants.