fuming borehole, simmering and steaming volcanic vent in hverir, myvatn geothermal area in iceland, close-up view

area boiling borehole closeup crater crevasse field fissure formation fumarole fume gas geology geothermal geyser hissing hot spring hverarapara hverir iceland icelandic land landmark landscape mineral mud myvatn natural nature orange pile red rock simmering smoke smoker soil solfataras steam stone sulfur sulfurous sulphating sulphur vent view volcanic water fuming steaming close-up