Blue Lagoon is a Geothermal Spa in Southwest Iceland
, located almost mid-way between Keflavik Airport and Reykjavik
, close to the town of Grindavik.
It is a by product of the nearby Svartsengi power plant. The warm waters are rich in minerals like silica and sulfur and bathing in the Blue Lagoon is reputed to help many 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) and is enjoyable year round, even in freezing conditions.