Two of the major waterfalls on the glacial river Jökulsá á Fjöllum, Hafragilsfoss and Dettifoss are both impressive in their own way. Hafragilsfoss has a single drop of 27 meters (89 feet) and has an average width of 91 meters (300 feet) while Dettifoss has a width of 100 metres (330 ft), a drop of 44 metres (144 ft) down to the Jökulsárgljúfur canyon and is the largest waterfall in Iceland in terms of volume discharge, having an average water flow of 193 cubic metres per second.
Mývatn is a shallow eutrophic lake situated in an area of active volcanism in the north of Iceland, not far from Krafla volcano. The lake and its surrounding wetlands have an exceptionally rich fauna of waterbirds, especially ducks. This video features Harlequin duck and Barrow's Goldeneye.