Litlifoss waterfall, below Hengifoss, a waterfall surrounded by columnar jointing in the Basalt rock, near Egilsstadir, Iceland, Polar Regions

litlifoss hengifoss water waterfall cascade rock geology basalt columnar jointing magma lava iceland egilsstadir cliff crag day outdoors landscape landscapes scenics nature natural world topography rocks physical geography surface processes waterfalls cascades polar regions horizontal