I updated the image above by bringing back the exposure on the trees. I had previously purposely brought it down to emphasize the amphitheater. But looking at it again I think it does look better with the exposure a little higher.
Cropping, I don't think is an option as the purpose of the photo is to show the amphitheater in its forest kind of setting.
The updated version is very fine for me, no need to use the crop tool!