Wow. There's not much to say about this one. The treatment and subject both work together to really emphasise the sense of mystery and wonder surrounding this place.
The only slight critiques I might offer would be:
1. The composition feels ever so slightly unbalanced. The heavy mass of the stones in the center of the frame lack the contrast evident in the periphery stones, making my eyes want to wander out of the center of the frame. This in itself is not a problem, but I end up feeling like the focal point of the image is incidental, in the bottom left corner, versus a key point in the composition.
2. There seems to be some slight smudges on the top of some of the stones. Birds? I feel that quickly photoshopping them out could help sharpen that central form.
Overall though, the image is superb. Excellent contrast, great subject, and absolutely stunning treatment.