What is Blue Lagoon (geothermal spa)?
[[File:Blue Lagoon Overview.JPG|thumb|[[:wikt:bathe|Bathers]] in the Blue Lagoon]] [[File:17-08-04-Blaue-Lagune-RalfR-DSC 2410.jpg|thumb|The main visitors' building of the Blue Lagoon]] [[File:BlueLagoon Noface.jpg|thumb|The Blue Lagoon pools in front of the [[Svartsengi Power Station|Svartsengi geothermal power station]].]] The '''Blue Lagoon''' ({{lang-is|Bláa lónið}} {{IPA-is|ˈplauːa ˈlouːnɪθ|}}) is a [[geothermal energy|geothermal]] [[spa]] in southwestern [[Iceland]]. The spa is located in a [[lava|lava field]] {{convert|5|km|mi|abbr=on}} from [[Grindavík]] and in front of Mount [[Þorbjörn (mountain)|Þorbjörn]] on the [[Reykjanes Peninsula]], in a location favorable for geothermal power, and is supplied by water used in the nearby [[Svartsengi Power Station|Svartsengi geothermal power station]]. The Blue Lagoon is approximately {{convert|20|km|mi|abbr=on}} from [[Keflavík International Airport]], and is one of the most visited [[tourist attraction]]s in Iceland. The Blue Lagoon is [[:wikt:man-made|man-made]]. The water is a [[:wikt:byproduct|byproduct]] from the nearby [[geothermal energy|geothermal]] [[power station]] [[Svartsengi Power Station|Svartsengi]] where [[heat]]ed water is transported from the ground near a [[lava|lava flow]] and used to run [[steam turbine]]s that produces [[electricity]]. After going through the [[turbine]]s, the [[steam]] and hot water passes through [[pipe (material)|pipes]] to provide heat for the [[human settlement|settlements]]. Then the water is fed into the Blue Lagoon. The water temperature in the [[bathing]] and [[swimming]] area of the Blue Lagoon averages {{convert|37–39|C|F|abbr=on}}. The water's light blue color is due to its high [[silica]] [[:wikt:content|content]].<ref>{{Cite web|url=http://www.visindavefur.is/svar.php?id=14019|title=Hvernig varð Bláa lónið til?|date=27 July 2015|website=Vísindavefurinn|language=is|access-date=18 March 2019|archive-date=30 May 2020|archive-url=https://web.archive.org/web/20200530011042/https://www.visindavefur.is/svar.php?id=1