The branch to Innsmouth had closed by the time of the events in “The Shadow Over Innsmouth”, but the Innsmouth Local still runs on the HO Scale Miskatonic Railroad, set in the 19th Century, with locations inspired by H.P.Lovecraft’s stories set in New England.
The centrepiecepiece is the splendid Victorian Gothic station of Arkham, modelled on the real-live station of Salem, MA (of witch-trial fame). Much like too much of the best Victorian architecture of Britain, it was demolished in the 1950s to make way for a car park.
Hat-tip to Kenneth Hite (who else?) for the link.