"The crazy disturbances in the subway—just look at the pictures!"
-- Langdon Shaw (WFT)
An underground network of commuter trains serving New York City.
In 1926, Credence Barebone's obscurus caused strange happenings to occur in the subway. Langdon Shaw apparently had photographic evidence of this. Eventually, the subway became the location of the final showdown with the obscurus and of the revelation of Graves's true identity (WFT).