All hot water in Iceland is naturally warmed. Because Iceland has so many active volcanoes, their underground magma chambers heat underground rivers and hot water springs bubble to the surface. A good deal of this water is piped away to towns and villages for domestic supplies or local swimming pools, and some is used to power geothermal energy turbines, but plenty remains for the locals to enjoy a geothermal swim. The Blue Lagoon spa is the most famous pool, but there are several rather more low-key and rustic bathing spots, such as Hveravellir in the central highlands, and Reykjadalur near the town of Hveragerði. There is even geothermal sea swimming in some places.
SPRING IN A SPRING