steaming fumarole in geothermal at namafjall geyser in myvatn

area autumn background beautiful clouds cloudy destination energy eruption fumarole fumaroles gas geology geothermal geyser geysir ground hot hverir iceland krafla lake landscape mountain mud myvatn namafjall natural nature northeast outdoor rock scenery sky smoke soil spring springs steam steaming stone sulfur sulfuric texture thermal tourism travel volcanic volcano