small volcanic fumaroles surrounded by a delicate rings of sulphur crystals and other colourful salts

acid area beautiful close crystalise crystals delicate fragile fumarole fume geological geology geothermal hot hverir hydrogen iceland icelandic krafla lake lava macro mafjall maskaradeg mini mountain myvatn naiexcl natural nature northern pass rhyolite rock salts small steam sulfide sulfur sulfuric sulphide sulphur sulphuric surrounding valley vapour vent volcanic volcano water yellow