Selfoss, in North Iceland, is one of a grouping of multiple waterfalls that are part of the Jökulsargljufur canyon and its companion glacial river Jökulsa a Fjöllum. The canyon is thought to have been formed by catastrophic flooding in the Jokulsa, which originated from Vatnojokull glacier after the last glacial period. Selfoss is the first waterfall in this river. Other major waterfalls from South to North are: Dettifoss (see Gallery), Hafragilsfoss (see Gallery) and Rettarfoss.
