Muspelheim

In Norse mythology, Muspelheim (Old Norse: Múspellsheimr), also called Muspell (Old Norse: Múspell), is a realm of fire. This realm is one of the Nine Worlds and it is home to the fire jötunn or the "sons of Muspell", and Surtr, their ruler. It is fire; and the land to the North, Niflheim, is ice. The two mixed and created water from the melting ice in Ginnungagap.

According to the Ragnarök prophecies in Snorri Sturluson's Gylfaginning, the first part of his Prose Edda, the sons of Muspell will break the Bifröst bridge, signaling the end of times: