Many Icelandic folk tales have been associated with Barnafoss, the most famous being about two boys from a nearby farm, Hraunsás. One day, the boys' parents went with their ploughmen to a church. The boys were supposed to stay at home, but as they grew bored they decided to follow their parents. They made a shortcut and crossed a natural stone-bridge that was above the waterfall. But on their way, they felt dizzy and fell into the water and drowned. When their mother found out what had happened, she put a spell on the bridge saying that nobody would ever cross it without drowning himself. A little while later, the bridge was demolished in an earthquake.
