steaming hot springs at seltun geothermal area in krysuvik with orange colours of sulphur soil, iceland

activity area boiling brown bubbling color colorful field fumarole fumaroles geology geothermal hissing hot spring springs iceland icelandic krysuvik krysuvikurhverir landscape lava mineral mud pot nature orange outdoor peninsula pool reykjanes reykjanesskagi rock seltun seltunshverir simmering smoke solfataras steam stone sulfur sulphating sulphur tourism travel vent volcanic volcano water yellow