observation deck in studlagil canyon (the basalt canyon) view of the grassy hill with vertical basalt columns, iceland

basalt brown canyon cliff column columns deck europe formation geology glacial gorge grass grassy hexagon hexagonal hiking hill iceland icelandic jokla jokuldalur landmark landscape lava magma mountain nature observation outdoor people platform point ravine river rock spring staircase stairs stream studlagil tourism tourist travel valley vertical view viewpoint volcanic walk wall water