Öræfajökull, the southernmost spur of Vatnajökull, forms a separate icecap over the immense Öræfi caldera. The nunatak (mountain peak) protruding from above Öræfi’s crater rim is known as Hvannadalshnúkur, which at 2110m is the highest point in Iceland. From Sjónarnipa it took 50 minutes to walk back to the Skatafell visitor centre.