kerlingarfjoll volcanic mountain range with sulphur gas in geothermal area on hveradalir trail located in icelandic highlands on

adventure attraction beautiful crater destination difficulty environment evening famous place field gas geology geothermal highland hiking hill hveradalir iceland icelandic highlands journey kerlingarfjloll landmark landscape majestic mountain range nature ridge rural rustic scenery scenic season sky smoke snow steam stone sulphur summer sunset terrain tourism travel trip valley view volcano wilderness kerlingarfjoll volcanic area trail located