Originally Posted by Vartha
Yeah, It's always been IN the Nine Realms, it's Niffleheim I wonder about it's location is.
Is it in Muspelheim's section of space or is it in Hel's section of Space? Thor Mentions Niffleheim in the First movie too, so, we KNOW it's around in one form or other.
In this set up I'm quite sure Niflheim is part of Hel. There are a few variants of the nine realms in the myths and when Hel and Niflheim aren't both there they are parts of the same realm.