Barnafoss is a beautiful waterfall located on the Hvitá river. Barnafoss is also next to its sister waterfall Hraunfossar, though the two cannot be more different. While technically a waterfall, Barnafoss acts more like a series of rapids that rushes through the bedrock on the edge of the Hallmundarhraun lava field. At one point in time, a natural bridge stretched over the waterfall, but it has been lost to time.