If you've ever wondered where old subway cars go when they have served their time, the answer is probably not what you'd expect. They don't end up in junkyards or parked in old railsheds. Instead, they serve a deeper (ha) purpose, sunk to the bottom of the ocean to form artificial reefs.
Via the STUDIO 360 Twitter feed, I found these stunning images of subway cars on the way to their final destination. This series of pics, some surreal and some surprisingly beautiful, were taken by NYC photographer Stephen Mallon. The MTA has been dropping subway cars into the deep all up and down the Atlantic Coast for the last ten years to create the artificial habitats for marine wildlife. Certainly a much more productive reuse than the scrap heap.