Ключевые слова: aquamarine, azure, beautiful, blue, caldera, color, contrast, crater, famous, geology, geothermal area, grimsnes, iceland, icelandic, krafla, lake, landmark, landscape, lava, magma, milky, mountains, myvatn, natural, nature, opaque, orange, round, sand, scandinavia, scenics, silica, sky, turquoise, viti, vivid, volcanic, volcano, water,