Foss á Síðu is a commonly seen waterfall that is frequently passed. This waterfall is located in the Southern Region and is viewable from the Ring Road (Route 1). Foss á Síðu is not a mighty waterfall, but its slender cascade against the dark cliffside and vivid greenery makes it truly beautiful. Many would be surprised to learn that Foss á Síðu is Iceland’s 14th tallest waterfall.

Urriðafoss is Iceland’s largest waterfall in volume, with a high river drop rate of 12,700 cfs (360 cms). The waterfall is located on the Þjórsá, the longest river in Iceland. In Icelandic, Urriðafoss translates to “Trout Waterfall.” The Þjórsá is a famous river for salmon and trout fishing. Even seals are reported to travel up the river to Urriðafoss to catch salmon.