I think it’s where there’s a beach-level cave with a hole on top. Waves crash into the cave and then blow out upwards from hole. The surf is pretty big in some places, so the resulting wind and spray updraft is quite strong. I don’t think a sane person would “frolic” around one of them, at least the ones I’ve seen.
Same type of mentality that wants to get up close to the adorable grizzly bear and pet it, I’m afraid.....