the desaturation brings our attention to the size of the rocks, and your composition clearly directs our eyes to that hammerhead balanced boulder..well done. Was the colour version too bright to keep in colour?
The colours are a bit drab (but theres nothing you can do about that really i suppose), its good that there's someone in the frame to add scale to it, nice sharp focus. A nice idea, just not very appealing. Good luck with it.
It's great that you have the woman in the photo to add perspective as to the size of the rocks, and a touch of color. This is a very intresting photo that could be in a travel magazine. It's artistic and documentary. Nice.