West of the E6, at the exit of the marked "Oldtidsveien", is Solbergfeltet with two outcrop fields with scratches. The field near the road has about 60 different images, including ships, people, and bowls. The second field is special in that it contains, among other things, a tree motif that is rare in Norway. According to the Norwegian archaeologist Erling Johansen (1919–2000), the Solberg field may have been a Bronze Age cult center.