check out the Beyond the Ice Wall Worldbuilding Project. the map is great (you can ignore the worldbuilding and just use the map for your own stuff)

i do like that it's more of a "snowman" and there are other worlds, a large continuous flat plain, and magic grows more intense the more ice walls you breach. it would be great for a steampunk or Weird Victorian setting, or fantasy pirate stuff but could work for modern conspiracy themed world