Hafragilsfoss drops 27m as it gushes downstream from the mighty Dettifoss within the depths of the Jökulságljúfur canyon. This milky waterfall is also on the glacial river Jökulsá á Fjöllum so it too is a very powerful waterfall. Like the other major waterfalls further upstrem, you can see the falls from both sides of the river. However, it's the west bank view that requires more of an adventure (which we didn't end up doing). The east bank view gives you a more distant but contextual view of the impressive waterfall. You can also get nice views of the canyon the Jökulsá á Fjöllum carved further downstream from your vantage point.