Vígríðr
In Norse mythology, Vígríðr or Óskópnir is a large field foretold to host a battle between the forces of the gods and the forces of Surtr as part of the events of Ragnarök. The field is attested in the Poetic Edda, compiled in the 13th century from earlier traditional material, and in the Prose Edda, written by Snorri Sturluson in the 13th century. The Poetic Edda briefly mentions the field as where the two forces will battle, whereas the Prose Edda features a fuller account, foretelling that it is the location of the future death of several deities (and their enemies) before the world is engulfed in flames and reborn.
Etymology
The Old Norse place name Vígríðr means "battle-surge" or "place on which battle surges". The name Vígríðr is sometimes modernly anglicized as Vigrid, Vigrith, or Wigrid. The etymology of the name Óskópnir is a matter of scholarly debate, but has been proposed as meaning "the (not yet) created", "not made" or "mismade".
Attestations
Poetic Edda
In the Poetic Edda poem Vafþrúðnismál, the god Odin, disguised as "Gagnráðr" faces off with the wise jötunn Vafþrúðnir in a battle of wits. Among numerous other questions, Vafþrúðnir asks Odin to tell him what the name of the plain is where the gods and Surtr will meet. Odin responds that the name of the plain is Vígríðr, and that the size of the field is 100 leagues in every direction: