Massive WW2 Fortress in a Very Remote Norwegian Location

A very much unknown place. Spectacular, but with a dark past. The prisoners of war that built this enormous WW2 fortress probably did not care much about the amazing views at this wonderful location in Northern Norway. The massive WW2 fortress here was the largest of its kind in Northern Europe and its guns were some of the largest ever built. Today the ruins are a fascinating place to visit, but few come here. This is a remote location. And the place is not well known.