The one that named them all - this famous hot spring gave its name to all geysers in the world. Also known as the Great Geysir, this famous natural attraction is part of the popular tourist route "Golden Circle Tour" consisting of, for example, the Gullfoss waterfall, the geothermal field in Haukadalur or a volcanic crater lake Kerid.
The boiling water can spring high into the air, once reaching the height of 170 meters. Nowadays, it erupts rarely - it is considered to be inactive. Even if you don't manage to see it shooting water, the area is definitely worth visiting.
Coordinates 64°18'49.818" N -20°17'58.237" E