Niflheim

In Norse cosmology, Niflheim or Niflheimr (Old Norse: [ˈnivlˌhɛimz̠]; "World of Mist", literally "Home of Mist") is a location which sometimes overlaps with the notions of Niflhel and Hel. The name Niflheimr appears only in two extant sources: Gylfaginning and the much-debated Hrafnagaldr Óðins.

Niflheim was primarily a realm of primordial ice and cold, with the frozen rivers of Élivágar and the well of Hvergelmir, from which come all the rivers.

According to Gylfaginning, Niflheim was the first of the two primordial realms to emanate out of Ginnungagap, the other one being Muspelheim, the realm of fire.