The office/bathroom is inside this building, and the first building in the album is visible through the trees in the background.
Abandoned Excavator
...With no bucket. Likely a Massey Ferguson 450.
Another office.
Some sort of office area, completely rotted out.
Workshop
Inside another building, some sort of workshop.
Exit (Entrance)
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!