Hjállparfoss (Help waterfall) is a beautiful waterfall in the spectacular valley Þjórsárdalur in the South Region in Iceland. The name is a bit strange since waterfalls seldom help but the name has its history. In the past when Icelanders traveled from the Northern Region to the Southern Region over the Highland, they had a hard time finding a field for their horses to graze along the way. As the altitude in the Highland barely allows for conditions that are favorable for vegetation.  

So after a two to three-day journey on their horses the grass by the waterfall in Þjórsárdalur was the first grass they found for the horses, on the lower land after the long trip. And that was a lot of HELP for the horses. And that's how the waterfall got its name. The waterfall by the grass field that helped feed the horses after a few days journey over the sandy and rocky Highland.

https://hiticeland.com/places_and_photos_from_iceland/hj%C3%A1lparfoss