turquoise geothermal hot spring in krafla iceland

activity adventure and aquamarine arctic area autumn background caldera circle cloudy colorful countryside destination ecotourism environment escape europe fall fire geological geology geothermal getaway horizon hot ice iceland icelandic krafla lake landscape minerals myvatn natural nature nobody outdoors peaceful pool recreation relaxation rock scene scenic serene sightseeing silica spring structure sunset tourism tranquil travel turquoise vacation view vista volcanic volcano wanderlust wild