Perhaps a little more contrast - and this would have been completely perfect. I love the contrast of the stone wall against the mighty mountains in the background, and the black and white tones gives complete the powerful atmosphere of this photo.
lots of interesting objects to study - the sky is beautiful with the patchwork of clouds, the mountains are majestic, and the railing is so ornate - but the choice of b/w processing here actually gives the left side of the image an almost nondescript look - little to no distinction between the mountain and railing on the left hand side of the image is visible - a higher contrast approach, some dodge/burn to separate the objects, the use of color instead of b/w - all choices i think might be worth exploring here