To me, this sounds fascinating. Unfortunately, I haven’t found a chance to visit the Scandinavian countries, yet. Regarding exploration: the old tower I mentioned is just a ruin, actually (if you are interested: Ruine Neuravensburg). The rest of the fortress is longe gone. Not much to explore. But it is a special spot to play some pen 'n paper RPG with pals in there
Now, I wish fore some monster filled ruins scattered across your maps. A dark tower looming above the treetops… is something like that achievalbe with a mod?