It seems like the land part is a bit underexposed due to the brightness of the sky on the right, which is what you would normally get. As I tend to like pics a tad darker (to me colours seem to show better when just a little darker), I don't mind the underexposure too much. Though if this were mine, I'd throw a well-feathered lasso around the land and see what auto contrast would bring - or adjust it manually, depends...
On my husband's laptop screen it'd surely look waaay too dark at the bottom, his screen is MUCH darker than the one of my desktop!
Work on those dust spots!