The Glenwood Power Plant (also known as the Yonkers Power Plant) was constructed circa 1904-06 and shut down circa 1963.  It sits next to the Glenwood railroad station.  The plant had sat abandoned for quite some time when I went to photograph it.  To my pleasant surprise on the day of my visit, we saw work being done to renovate/reuse the building!  I am unsure of its current status.

More information:  Goran Group (real estate developer)

Location: Google Maps