Mick Hartley

The Tennessee Coal, Iron & Railroad Co.'s steel works at Ensley, Alabama, 1906:

[Photo: Shorpy/Detroit Publishing Company – cropped]

Full size here. 

The Ensley site was finally shut down in 1976. Here's what it looks like now (scroll down past the photos of the Muscoda Mines).

Ensley was also photographed by Bernd and Hilla Becher, the ground-breaking photographers of the typology of industrial buildings – here in 1982, for instance – though sadly there's nothing on the web remotely comparable to the quality of their work in print.