steaming fumarole in hverir, namafjall, iceland

acid area attraction blue boil boiling cracked crust dramatic field fumarole gas geological geology geothermal hverarond hverir iceland icelandic krafla landscape mineral mud mudpot multicolored myvatn namafjall namaskard natural nature outdoors scenery sky smell smoke soil solfatara spring steam steaming stinking sulfur thermal tourism travel vapor volcanic volcano warm