Blue Lagoon- the geothermal spa

Blue Lagoon, 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. The steamy waters are part of a lava formation.

The warm waters are rich in minerals like silica and sulphur and bathing in the Blue Lagoon is reputed to help some people suffering from skin diseases. The water temperature in the bathing and swimming area of the lagoon averages 37-39 °C.

The  man-made lagoon is fed by the water output of the nearby geothermal power plant Svartsengi and is renewed every 2 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.

Visitors are required to shower without clothing in the communal shower area before and after bathing, because of Iceland’s strict code of hygiene.

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