Kerid explosion crater with lake of green water, near Reykjavik, Iceland, Polar Regions

travel destination horizontal outdoors day no people kerid explosion crater lake green water iceland reflection volcanic landform landscape crater lake explosive volcanism caldera aquamarine mineral content water table drainage still calm remote natural landmark local landmark non urban scene kerith tourist destination place of interest outside daytime nobody no one no one europe icelandic european reflected reflecting reflect mirroring mirrored reflections craters calderas volcanoes volcano landmarks