boiling sulphurous mud springs at namafjall hverir, east of lake myvatn, northern iceland

attraction autumn background beautiful beauty boiling boiling water clouds cold cracked desert duncan brown fall fumarole geothermal hot hverir iceland lake landscape lava mountain mountains mud myvatn mývatn namafjall nature námafjall october outdoor park road rock scenic sight sky snow spring springs steam sulfur sulphurous tourism travel vent visitor volcanic volcano water