Nice work, I think you could use some warmer tones in the mid ground tho, notice how well that warm highlight works; try to figure out a way to collaborate that on to the ground with less saturation. And something needs to be done with those two columns in the mid ground. Lighting, I think, seems to be the problem, some shadows on the ground should help.
Really lovely work. There is just one small problem in mho... i think you have some issues with the textures of the foreground rocks. The left one looks too flat and the right one out of scale. Anyway, i think you did great work!