

Grettislaug is a pair of small stone geothermal pools on the coast of the Skagafjörður fjord in North Iceland, about 25 km north of Sauðárkrókur. The pools are filled with naturally heated water at 39–42°C year-round and carry a rich mythological heritage — according to Grettis Saga, the outlaw Grettir swam across the icy fjord and warmed himself in these very pools in the 11th century.
The setting is scenic and understated: the pools sit between a low grassy bank and the fjord shore, with the island of Drangey — where Grettir made his final stand — visible on the horizon. The experience is authentic and low-key, with no crowds or luxury amenities. A simple changing cabin and shower are the only facilities.
Entry costs approximately 2,000 ISK for adults (campers at the adjacent Reykir farm pay a combined camping and pool fee). The pools are open year-round with no booking required.