hverir hot mudpools in iceland

hverir hot mudpools iceland icelandic island country isle nature natural reykjahlid myvatn village town skutustadahreppur geothermal area energy geothermic smoke heat spring vapour steam namaskard hverarond mudpot mudpots mud mudpool boil boiling fumarole fumaroles sulfur sulphur fumerole fumeroles tourist attraction travel destination landmark krafla volcanic hole namafjall holes boiliing close