Devil’s Bridge, Kirkby Lonsdale
Is illegal and plenty of signs to say so. Following a couple of deaths I believe. There’s at least one memorial plaque down at the water edge. One of those where there’s a deep channel in the middle and a lot of just under the surface but not really visible rocks along the edges.
EDIT to add, however someone above mentioned Stainforth Force, about 30 mins down the road from Kirby Lonsdale – absolutely brilliant for a bit of jumping in off the waterfall and general swimming a little further downstream. Knights Stainforth campsite is right next to it too and is a good family site.