Tubes and pipes II by hakkat on DeviantART a picture taken at the landschaftspark (Duisburg, Germany)
Picture of some abandoned machine plant
everything under control. location/photographer unknown.
Völklingen Ironworks by Fabien Gautier on 500px
Power Plant R by Filth City
Bernd & Hilla Becher, Blast Fumace, Esch sur Alzette, 1981
Steam Storage (by steve morel)