Hyperboria is a real wierd province; I've never been up there myself but I cheated when I saw this thread to see what was going on, using "toggle_fow". (sorry who I spolied it for) The settlement, Themiskrye (or something like that) is really well hidden. It's in the middle of this huge forest enclosure, with a small opening. I see why it must be hard to kill the Amazons.