Your guess is as good as mine as to what this place actually is!
as you pass through the badger hole it opens out into a spiral as you get further in the headroom improves slightly, the stone bowl is said to be some sacrificial device
The caves are certainly very odd looking and a little spooky. As a result, they have become very popular for nocturnal Satanic rituals. Unfortunately, not everybody thinks that is such a good thing. When two warlocks turned up at a house nearby asking if they could have their cloaks back – they’d left them accidentally in the cave one night – the locals decided enough was enough. Now the caves are locked.
as you pass through the badger hole it opens out into a spiral as you get further in the headroom improves slightly, the stone bowl is said to be some sacrificial device