Skaftafell Glacier sunlit curving Vatnajökull national park glacier tilt up to mountain range, Aerial view

skaftafell glacier sunlit curving vatnajokull national park glacier mountain range aerial view ice cap drone aerial shot iceland nature landscape scenery snow winter sunrise cold glacial blue iceberg crevasses moraines morsardalur valley climate change global warming melting glaciers preservation environmentalism sustainable tourism adventure travel expedition hiking mountaineering climbing heliskiing trekking cave exploration polar regions arctic aerial diminishing daybreak