This is Ilam Rock, about which I have posted once before, so I'm going to be quiet and just allow you to enjoy the photo.
Almost directly across the river is Pickering Tor.
This cave close to the foot of Ilam Rock is one of many in the gorge. Although unpromising from the outside, the roof rises to make quite a spacious place.
Looking out, you can just spot the end of the wooden footbridge on which I was standing to take the first photo. Also, notice the puddle. The day outside was bright and sunny, but water seeps slowly through limestone and there was a regular drip rippling this wetness.