Even older looking stairs - the mine has history back to the 1800s, but this is probably not that old. The building on top of it appears to have burned, leaving behind electric wires and boxes.
Another office.
Some sort of office area, completely rotted out.
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!