where does the blue lagoon water come from
Blue Lagoon (geothermal spa) The lagoon is a man-made lagoon which is fed by the water output of the nearby geothermal power plant Svartsengi and is renewed every two 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.
Legend of the Blue Sea Filming began on August 19, 2016 in Goesan, North Chungcheong Province, South Korea. The production team then flew to Palau to film underwater scenes.[22] The cast and crew flew to Spain on September 11 where they filmed in A Coruña, Ribadeo, Lugo, Tossa de Mar and Castell de Santa Florentina[23][24][25] in Canet de Mar, as well as Begur (Es Cau Swimming Pool), Sitges (Town Hall and other backdrops) and Barcelona (exteriors of Palau de la Música Catalana, etc.),[26][27] among other places in Catalonia and Galicia (Spain).[28][29] The first script reading was held on October 8, 2016, two months after production began, due to the busy schedules of the actors. It lasted three hours and covered the first four episodes.[30]