Ключевые слова: adventure, arctic, attraction, beautiful, cave, crimson, crystals, dark, darkness, deep, depth, diamond, epic, europe, european, formation, geologic, geology, heritage, ice, iceland, icelandic, jewels, lava, legend, magma, minerals, nordic, norse, northern, old norse, phenomenae, picturesque, raufarholshellir, red, rock, saga, sagas, scenic, shiny, spring, stone, subterranean, tour, trail, tunnels, underground, viking, volcanic,