Öxarnúpur is a rocky, 146-meter high slope of the Núpur mountain.

Öxarnúpur holds significant importance in Icelandic folklore, as it is home to Grettisbæli, a site known as the hideout of Grettir the Strong, one of the most famous Icelandic outlaws from the Viking Age. This hideout is marked by a structure supported by large basalt columns, which provided Grettir with a natural refuge.

The location offers a unique view of Iceland’s rugged landscape and its historical connection to the sagas that tell of Grettir’s deeds and his life as an outlaw. These stories capture his strength and the strategic advantage offered by such a natural fortress, where he could evade his enemies.