Dettifoss is a waterfall on the river Yekulsau-au-Fedlum in Northeast Iceland, and it is the most powerful waterfall in Europe. It is located in the most famous national park of Vatnajökull.
It is located between two other waterfalls: Selfoss, which is at a distance of 1 km upstream, and Hafragilsfoss, which is at 2 km downstream. The width of Dettifoss is about one hundred meters, and its height is 44 meters (9 meters lesser than Niagara Falls). Its average water flow is about 200 cubic meters per second. Not far from this waterfall is located the Lake Myvatn. The musical composition Dettifoss by Jón Leifs was inspired by this waterfall. It also appears in Ridley Scott’s movie Prometheus, where is shown as one of the prehistoric landscapes.