hengifossa river gorge landscape with basalt rock formations, waterfalls and grasslands

basalt basaltic canyon cascade clay cliff cloud column drop east europe fall fljotsdalshreppur fljotsdalur flow geology gorge grass grassland hanging hengifoss hengifossa hill iceland icelandic island landmark landscape lava litlanesfoss moss mountain natural nature outdoor river riverbed rock scenery scenic sky stone stream tourism travel valley view volcanic water waterfall