Resturant at the Blue Lagoon, 39 km from the capital city of Reykjavík , geothermal spa is one of the most visited attractions in Iceland. The steamy waters are part of a lava formation. 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 40 °C (104 °F).
The lagoon is fed by the water output of a nearby geothermal power plant.