Selfoss may only be 10m tall but it's attractively wide and horseshoe-shaped. Being on the powerful glacial river Jökulsá á Fjöllum, it's still powerful. The falls can be viewed from both sides of the river though the east bank lets you get right up to the falls while the west bank yields a more direct view. The walk from Dettifoss to this falls from the east bank is 1.4km each way. The walk is quite a bit shorter on the west bank, but again the falls view is a bit more distant.