<P> The Blue Lagoon (Icelandic: Bláa lónið) geothermal spa is one of the most visited attractions in Iceland . The spa is located in a lava field in Grindavík on the Reykjanes Peninsula, southwestern Iceland . Bláa lónið is situated approximately 20 km (12 mi) from the Keflavík International Airport and 39 km (24 mi) from the capital city of Reykjavík, roughly a 21 - minute drive from the airport and a 50 - minute drive from Reykjavík . </P> <P> The warm waters are rich in minerals like silica and sulfur and bathing in the Blue Lagoon is reputed to help some people suffering from skin diseases such as psoriasis . The water temperature in the bathing and swimming area of the lagoon averages 37--39 ° C (99--102 ° F). The Blue Lagoon also operates a research and development facility to help find cures for other skin ailments using the mineral - rich water . </P> <P> The lagoon is a man - made lagoon which is fed by the water output of the nearby geothermal power plant Svartsengi and is renewed every two days . Superheated water is vented from the ground near a lava flow and used to run turbines that generate electricity . After going through the turbines, the steam and hot water passes through a heat exchanger to provide heat for a municipal water heating system . Then the water is fed into the lagoon for recreational and medicinal users to bathe in . </P> <P> Iceland has a strict code of hygiene and guests are required to shower prior to enjoying the geothermal spa . The communal showers are split up by gender . </P>

Where does the blue lagoon water come from