Hjálparfoss (whose name means Helping Falls) is a double waterfall that is split over two separate flumes that joins at its base.  The falls are situated in Fossá river in Þjórsádalur.  The surrounding area is a remnant of various eruptions from Iceland’s most active volcanoe, Hekla.
In earlier times travelers, who  crossed Sprengisandur highland route, found great aid in reaching the water and lush vegetated area to graze their horses after their long journey over the desert, hence the name