dettifoss waterfall in vatnajokull national park in northeast iceland

attraction basalt canyon cascade cliff column crevice dettifoss edge energy europe fall famous fjollum flow flowing force glacial glacier grey ice iceland icelandic jokulsa jokulsargljufur landmark landscape national park nature outdoor power powerful precipice reserve river rock scenery scenic snow spectacular spray spring steam stream travel tumbling valley vatnajokull water waterfall northeast view columns