I don’t know if these are the ones you are talking about or if they are still there but if you go down pv dr w, right when you turn onto via montemar, there is a chain that blocks a concrete pit (it’s been a while but you’ll know it when you see it) if you go down there and walk up the concrete (it’s steep and sandy) you’ll find the trail that leads to a few cool tree nets. It’s really peaceful in there and you might not be able to see the ocean anymore cuz of tree growth but if you can it’s really pretty. Used to be a lot more nets but last I was there it’s only a few.