hverir myvatn geothermal area, iceland

all area boil color cone crater energy facility fields fumarole geology geothermal geyser geysir hot hverarond hverir iceland lake landscape lava mars mud myvatn namafjall namaskard natural nature pool pools red reykjahlid skutustadahreppur smoke spring steam steaming sulfur sulphur thermal travel vapour vent vents volcanic volcano