Our final stop on the tour is the Deildartunguhver Thermal Spring, which is apparently the most productive thermal spring in the world, producing 180 litres of boiling water every second. A 74km pipe connects the spring to the local towns of Akranes, Borgarnes and Hvanneyri. The water is 100C when it leaves Deildartunguhver and has only cooled to 66C when it reaches the far end of the pipe.
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