I just did a quick and dirty re-do of your pic--couldn't do much with it, as it is such a small, non-RAW image, and I couldn't open it in ACR--you can do much more with ACR--but I used Nik's plugin, Viveza, to darken and saturate the sky, and then to up contrast in the mountains, greenery, and rocks. I also saturated the green a bit more in the greenery. Then I used Nik's Dfine 2.0 to de-noise a couple of times, as the sky was quite noisy. You may think it looks horrid, but I just wanted to give you an idea of what I meant. Don't worry, I've deleted this from my computer now--I would never give it away or show anyone else. I hope you don't mind. . . ?