Réttarfoss

2.5 kilometres further up the river than Dettifoss, this waterfall is 27 metres high and about 91 metres wide. Access is via a lookout point from the car park (unsealed) or via a trail that allows you to get much closer to the waterfall from Dettifoss (car park is sealed).

Supposedly Europe's most powerful waterfall. With a drop of 44 m and a width of 100 m, it has the second-largest volume discharge in Iceland, only behind Urriðafoss (which is much smaller).

One of the two main highlights of the park features a very unusual and large cliff formation 60 km east of Húsavík, which is said to be the hoofmark of Odin's horse.