A part of the <a href="https://en.wikipedia.org/wiki/Outokumpu" class="extiw" title="en:Outokumpu">Outokumpu</a> factory in the Röyttä area of the city of Tornio in Finland. Prominently featured in the photo is probably the ferrochrome plant.
<a href="//commons.wikimedia.org/wiki/User:Methem" title="User:Methem">Methem</a> (Mikko J. Putkonen)
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>