Selfoss (Icelandic pronunciation:[ˈsɛlˌfɔsː]ⓘ) is a waterfall on the river Jökulsá á Fjöllum in the north of Iceland. The river drops over a number of waterfalls over about 30 km before flowing into Öxarfjörður, a bay of the Arctic Sea.[citation needed] The river originates as melt water from the glacierVatnajökull and therefore the water flow varies depending on the season, the weather and volcanic activity.[1]
A few hundred meters downstream of the 11 m (36 ft)-high waterfall is Dettifoss, the second-most powerful waterfall in Europe. Below the falls, the river passes through a gorge which is part of the Jökulsárgljúfur National Park.
