An interesting bunker construction with a much larger gathering area of influence to gobble up a ball to a smaller and easier to maintain sand pit. Something like the road hole bunker.
I assume this is another work by Phillips of a combination of using natural terrain and creating sympathetic dunes-like mounds and contour, as he did at Kingsbarns. It appears Phillips really has a great touch for the manufactured emulations. I like all that I've seen in photos of his work.