I particularly like the toning you have added to this shot-- it works very well to emphasize the textures in the rock and the contrast to the sharp, angular railing. However, the uneven horizon is pretty distracting, in my opinion, and you might have been better served to get more of the rock at the left in the frame, particularly at the top of the frame.
PS -- didn't score down for it, but you are missing a couple of pixels along the left and top edges. This may have happened during cropping/resizing.