The Gljúfursárfoss is an awesome waterfall with a singel drop of appr 45 meters, easy to reach, not far from Vopnafjörður in teh east of Iceland.
From Vopnafjörður drive south to Hof on road 85 and then turn left (at the end of the water) on road 917 (Hildarvegur). After 10,5 kilometers you will cross the river Gljúfursá where you can see the top of the Gljúfursárfoss.
Park the car along the road and walk towards the sea where you will have an awesome view on this powerful waterfall, Gljúfursárfoss. Here the river Gljúfursá ends in the ocean with a single drop of appr. 45 meters. There aren’t so many waterfalls ending (almost) directly in the Ocean.