From Wiktionary, the free dictionary
hällristningar i Landverk vid Ånnsjön
Probably from land + verk, compare Norwegian Nynorsk Landsverk.
Landverk n
- A village in Jämtland County, Sweden, on the northern coast of Ånnsjön
- An area in Jämtland County, on the western end of Alsensjön lake