Divine Comedy discussion

•The first level: Asgard, world of the Aesir; Vanaheim, land of the Vanir; and Alfheim, land of the light elves.
•The second level: Midgard, Land of humans (middle world/garden); Nidavellir, Land of the dwarfs; Jotunheim, Land of the giants (Jotuns); and Svartalfheim, Land of the dark elves.
•The third level: Niflheim, World of the dead and
Muspelheim (Muspell), the land of the fire giants.

http://www.viking-mythology.com/theNi...

Yggdrasil: Nordic for The World Tree

It was created by Odin when he killed the giant Ymir. The tree binds all nine realms together into perfect harmony. If the tree were to be thrown off balance (one or more worlds gone) it would cause the end of everything in existance.