In the middle of the fissure on the Mid-Atlantic Ridge (in the south of Reykjanes) is the geothermal area Krísuvík. The main geothermal areas in Krýsuvík are Seltún, Hverahvammur and Hverahlíð.

The banks around the hot springs are coloured green, yellow and red. Columns of steam rise skywards and the bubbling mud pools play their rhythmical symphony.