pahoehoe lava lobes at fagradalsfjall, iceland, with orange glow

rock geology soil nature wilderness pahoehoe lava flow fagradalsfjall iceland crust gray black molten red orange activity adventure background basalt beautiful burning close danger dangerous earth erupting eruption flowing geldingadalir geldingardalir glow hazard heat hot landscape liquid natural outdoor outside ropey ropy scenic sun texture tourism travel view volcano volcanoes orientation lobes