In Norse mythology "the nine realms" encompass the entire world - but there's no definive list of what realms constitute the nine.

In the center, humans inhabit Midtgård. The gods in Valhall and the Jotun in Jotunheim.

Then there's also Helheim or Hel - for the dead, Alfheim for the elves, Svartalfheim for the dwarves...

https://commons.wikimedia.org/wiki/Category:Locations_in_Nor...