
1) Location in Norse mythology
Found on
https://www.crosswordclues.com/clue/amsvartnir

In Norse mythology, Amsvartnir (Old Norse `pitch black`) is a lake. Amsvartnir contains the island Lyngvi, where the gods bound the wolf Fenrir. The lake is solely attested in the Prose Edda book Gylfaginning, written in the 13th century by Snorri Sturluson. In the book, the enthroned figure of High tells Gangleri (king Gylfi in disguise) that t.....
Found on
http://en.wikipedia.org/wiki/Amsvartnir
No exact match found.