volcanic landscape of leirhnjukur, myvatn geothermal area in iceland, with turquoise sulfurous ponds

area blue caldera cloud crack crater crevasse field fissure formation fumarole gas geology geothermal hot spring hverarapara hverir iceland icelandic lake land landmark landscape leirhnjukur mineral mountain mud myvatn natural nature orange outdoor park red rock simmering smoke soil solfataras steam sulfur sulfurous sulphating sulphur tourist travel turquoise volcanic volcano water waterating ponds springs mountains background