Fossá is the name of several rivers in Iceland that are known for their waterfalls.
The most well-known is Fossárdalur, which runs from Þingvellir towards the southern side of Hvalfjörður.
This river is characterized by numerous waterfalls, with the most popular one located near Route 47, where car parking is available.
The term "Fossá" is derived from the Icelandic words "foss" meaning "waterfall" and "á" meaning "river."
It is a common name for rivers in Iceland that feature waterfalls.