Half Dome, Yosemite Valley. I found the trees at the bottom and the low clouds to create a natural frame to this image and help the viewer focus on the center. Also, right in the center, the trees in the light help create a sense of scale, as this 'rock' in massive.
In terms of post processing, I applied both global and local adjustement, reviewed the color balance, applied a bit of dodge and burn and sharpening