This map was created by Shrykull (Guilherme Coelho) from Portugal , and compares actual in-game environments to the drawn map.
It is rather large, both in pixel size and file size,
so it may take a few moments to download.

3249 x 2899 pixels (2.31MB)
Note from Shrykull: "The rules of architecture don’t even apply to BO1…As you can see, all the city of Avernus can’t possibly be placed at the given area. I was lucky that at least most of the cathedral could be shown on the map! =P ...And the Plains of Blood I didn’t even remember. But I can imagine they wouldn’t also fit there. Oh, and the Pillars are an “off-map” location, I placed them there because it was where they looked better."