Bergkulpen (Rock Pool) is the deep, turbulent pool by the end of the road on the west side of the river. Rock Pool is the lowest pool in zone 3. Due to the turbulent water and different currents, presenting the fly in a conventional way might prove tricky, but since there's always fishing hiding in here, I wouldn't pass it without trying. Be very careful at the rock, as this is the last place you want to fall in!