Dettifoss Waterfall, Iceland
Dettifoss is a waterfall in Vatnajökull National Park in Northeast Iceland, and is reputed to be the second most powerful waterfall in Europe after the Rhine Falls. Dettifoss is situated on the Jökulsá á Fjöllum river, which flows from the Vatnajökull glacier and collects water from a large area in Northeast Iceland. The sediment-rich runoff colors the water a greyish white.
The falls are 100 metres (330 ft) wide and have a drop of 44 metres (144 ft) down to the Jökulsárgljúfur canyon. It is the largest waterfall in Iceland in terms of volume discharge, having an average water flow of 193 m³/s. The superlative of “most powerful” comes from its water flow times its fall distance. The water of the wide Jökulsá á Fjöllum river falls for more than 44 metres. The Norwegian Sarp Falls (Norwegian: Sarpefossen or Sarpsfossen) has a greater average water flow, but only with about half the height of Dettifoss.