As we all know, Atmora is pretty much a barren frozen landscape now, but looking at Ancient Nordic architecture in Skyrim I have been trying to get an idea of how the proto-Nordic lands looked like.
If you look at places like Bleak Falls Barrow, Labyrinthian, Ragnvald, and Lost Valley Redoubt (just to name a few) you can see the prevalence of massive arches, and spires (totum looking things). I want to ask, are the Nordic Ruins in Skyrim a pretty good picture of what Atmora is/was about?