This is Cauldron falls in West Burton, Yorkshire. (Not to be confused with Cauldron snout in Upper Teesdale). It really does resemble a cauldron after rain. It was painted several times by, and was a favourite of the artist Turner. Maybe he was trying to get the silky water effect in which case perhaps, he should have painted slower…..
This is a fairly conventional view but my favourite is that which I saw when I first came upon it. I’ll post that in WS.