cliff danger drop exercise green hike hiking incline islands landscape Lofoten Islands mountains natural nature norway norwegian ocean outdoors path remote ridge rocks sea slope steep stones stony track trail Trek view walk water wild active adventure alpine alps backpack challenge cloud cold confused direction equipment Expedition exploration extreme fog goal group Kebnekaise lost mist mountain mountaineering people que snow sport success top tour travel Trekking wait wilderness winter alpinism altitude dangerous decay glacier glaciology Graubünden ice ice-flow icy Morteratsch mountaineer outdoor pathway recreation risk silhouette sports summit swiss switzerland terrain tourism backpacking brave climb climber climbing global holiday man warming change cliffs climate edge melt melting 3D abstract computer flying screen screensaver space speed star warp