blue ice cave in skaftafell glacier, part of vatnajokull national park, iceland

arctic blue ice cave cavern climate cold crack crevasse crevice europe falljokull fissure formation frozen glacial glacier hike hiking hole cap iceberg icecap iceland icelandic icy landscape mountain national natural nature oraefi outdoor park reserve roof scenic skaftafell skaftafellsjokull snow svashy nafelsjokull tourism travel tunnel vatnajokull vatnajapara kull white winter