The cliffs on each side of this road once served as ancient fortresses. On rock fortresses, like the ancient fortresses at Tjælder, easily accessible places have been reinforced with walls. Walls and ramparts may have been crowned by wooden palisades like the illustration above.
When the ancient castle at Tjälder was active, there was a lake at the northern end, Mästermyr, which today is farmed. At the southern end of the lake was the large Bronze Age cairn Majster rojr. A road towards Gane in Bäl used to go past the ancient towns. It is believed that the road may date back to the Bronze Age, as it passes many ancient remains from the Bronze Age.