Visited with Femaxer , South of Grängesberg, a mountain a converter station, which long since been taken out of service. to me its a bunker and seems to be a place to hide trains and some elctrical and telecoms substation type thing (im sure Bunkerlogen will correct me ) , i know nothing more Swedish sources say "the substation has been open until recently but is now shut up and will reportedly be for sale.
Pix
Thanks
Flickr
Pix
Thanks
Flickr