Throughout New York's subway system there are nooks and crannies that go generally unnoticed by the crowds of commuters. The above is a nestled doorway directly off the track on the north end of the north-bound local R/W platform at 34th Street. On the other side of that same platform are a couple of old doors with new locks -- a sure sign of something old and important/dangerous. Part of the charm of the tunnels that make up the transportation system here is the fact that they are man-made, for largely utilitarian purposes, yet over such an extended period of time that some of its crenelations are actually lost. Others, like this door, are mysteries that simply get overlooked a-thousand-plus times a day.
Open your eyes. The underground is everywhere.