Nautholsvik Geothermal Beach

"At Reykjavík’s geothermal beach at Nauthólsvík, where runoff from the city’s hot-water supply is used to heat a small lagoon of sea water—it can reach temperatures of up to 22°C." Full review

"At Nauthólsvík, runoff hot water from the city’s geothermal heating system is pumped into the ocean...a hot water pool and hot pots give it the air of a more formal facility. " Full review

"The sea water is geothermally heated with temperatures reaching 15-19C in summer. People swim in the human-made lagoon then enjoy the hot tubs and sand and steam-baths."