To get to the lookout tower "Ruhner Berge", you have to turn off the bike and walk. The little detour is worthwhile in any case, because the view from the top of the mountains and forests is simply breathtaking.
From the street there are 112 steps up to the observation tower. The tower can be reached via 179 steps. But the view is fantastic and rewards the effort of the ascent. There is no bicycle access around the tower.