someone browses /x/, I see.
Edited:
Honestly the story sounded bullshit to me, but if you really want to find out but don't want to go blindly running through underground tunnels to figure it out, try to find schematics of the subway system in question, or get them from the MTA. Figure out where the hole would be, and check the NYC assessor's database to see if any buildings in that area have inactive or condemned underground parking structures.
Haha yes, I did find out about it through that urbex thread on /x/
I would think it was completely bullshitted, but i was just talking to a good friend of mine (he's a former navy vet, not one to lie) who said he's been down in other tunnels before with his friend who worked for MTA and saw similar town's to the one i just explained: they have discarded furniture, wooden awnings, books, and other shit they find arranged in a town almost.
I know towns like this exist, im just not sure the specific town i mentioned exists.