Reykholt is one of the most famous sites of Icelandic history. The location of Reykholt is at the intersection point of division lines between main convection rolls.
One line creates the Reykjanes Ridge, a section of the Atlantic Ridge, the other line contributes directly to Katla, Hekla and Prestahnúkur. Where those lines meet, the famous geothermal area of Reykjadalur, including Reykholt and the most powerful hotspring of the world, Deildartunguhver, appear.
Snorri Sturluson lived there, wrote about history and mythology, besides that he most likely wrote Egils saga. His farm was heated with geothermal heat, making use of steam from nearby hotspring by letting it through pipes under the floor within the farm.
https://www.geothermal-energy.org/pdf/IGAstandard/WGC/1995/1-fridleifsson.pdf
