Hi Plav! Those embankments exist, they are visible on LIDAR from 2022. The narrow double side shaped terrain was created once a long time ago as the foundations for the fortification of a hill-fort. I did not add a historic=archaeological_site on a node because I passed there quickly by mountain bike and did not notice if any boards or a sign would officially indicate the site as such. If I would have done that and there is nothing else than the embankments, that might disappoint users viewing the map expecting to see more than the embankments like ruins, walls, board with description, etc.