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.
A well maintained boardwalk winds through the geothermal fields and visitors can find information and educational signs all around, explaining the geology of the geothermal area. Hikers can find a winding path leading to the top of the massive steaming vent, the view from the top is spectacular, of both the ocean, the geothermal fields and the lakes.
Few lakes are beside the mudpots and suplur deposits. Lake Grænavatn, Gestsstadavatn and Augun (the Eyes) are explosion craters formed by volcanic eruptions. Lake Grænavatn, 150 feet deep, glows with rich, deep green color, because of thermal algae and crystals that absorp sunlight.
The Krysuvik Geothermal Area of the Reykjanes Nature Reserve is where visitors can experience geothermal power in a more natural setting with boiling mud springs surrounding the world’s largest blowing steam vent. The nearby Seltun geothermal field is teeming with active hot springs, bubbling mud cauldrons and marked walking paths.