geothermal area hverir, s d road and multicolored, cracked surface, namafjall, iceland

and area boil bubble cracked crater crust dangerous dramatic energy field fog fumarole gas geology geothermal ground hole hot hverir iceland icelandic krafla landscape lava mud mudpot multicolored myvatn namafjall nature orange pot road shaped soil spring steam stream sulfate sulfur surface thermal volcanic volcano