Boiling mudpools in geothermal area on Reykjanes Peninsula, near Keflavik, Iceland, Polar Regions

color image photography outdoors no people nobody vertical iceland travel travel destinations scenic scenics dramatic volcanic landscape boiling mud pools geothermal reykjanes peninsula keflavik nature beauty in nature non urban scene cloudy cloudy sky weather meteorology physical geography mud pot heat steam steaming sulfur mineral bubble bubbling grey day