From Newsday via SecondAvenueSagas, we learn that the MTA is hiring someone to map out all the forgotten corners of the subway system, ostensibly for security purposes. What I wouldn't do to get that map on my office wall in blueprint size.
When I was about twelve or so, the X-Men introduced a storyline about a community of mutants living in an abandoned subway tunnel deep under Manhattan. Preposterous! I thought, as I suspended my disbelief for telekinesis and adamantium claws.
But damned if I wasn't shocked to learn, as a full grown man, that there's a lot of abandoned track down there, and some of it apparently unmapped. I hope this comprehensive map does not get locked down entirely, but is available to planning and transit groups. It would be a useful tool for identifying areas to reopen or extend the system, e.g. express service on the F in BKLN and of course, the 2nd Ave subway.