I thought Tundra was a part of the environment?
Tundra is the definition of an environment with certain weather etc. At a Tundra, there is not much life at all. No trees, nothing. Snow as far as the eye can see, only small bushes live there. If there is a real Tundra if Skyrim, it can't be too big for there is nothing there
But if they add in fantasy creatures and plants living there, it could very much be a great place to explore.