Setting
"An ancient, outdated sewer complex and underground transportation system."
Miles upon mile of tracks, that extend throughout all of New York City. These tracks can get you anywhere you want to. This is the infamous New York City subway system. A lot can happen when taking a trip on one of these, but it's nothing to locals. Recently, the subway cars have become a thing of the past as sparkley new, above ground versions have replaced them.
The combination of these two underground systems have become home to society of mutants and humans, known as the Morlocks. Because they stay offthe radar, they tend to be left alone by the government and any other affiliated organizations.