The Blue Lagoon is a geothermal spa where you can pay to go in and deepen and immerse yourself in a lagoon filled with steamy hot water (about 100 F or 40 C) from nearby Svartsengi power plant. Why blue ? because of high concentration of blue-green algae (cyanobacteria). These bacteria could not thrive as the tempt cool in the air. It claims that the dead algae in the lagoon combined with silica mud can be cured certain kinds of skin condition. On that day in mid-april when I was there, the air tempt is cold (about 45 F) and the water tempt is hot (98 F). Make an appointment to have a silica in-water spa treatment in the open air lagoon. Laying down on a wooden bench subimmersed in hot water, you are pampered with
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