Judging from the abundance of 440 volt hookups in the building, this likely was some sort of machine shop.
Garage Door
Outside view of another building showing the decay of the area.
Another office.
Some sort of office area, completely rotted out.
Worker's Desk
Abandoned Excavator's Engine
Benson Mines is a long-abandoned iron mine near Watertown, NY.
The mine was shut down in 1978 and the buildings and have been completely abandoned ever since.
Abandoned man-made structures are my favorite to take pictures of, so I couldn't resist exploring!