The focal point of the image for me is the dramatically polarized sky on top left. That looks good. Perhaps that was your intention.
I would have liked to see more detail.. a clearer silhouette of the gate like structure in the water.
if u only have one exposure, the way to do it is to go back to your raw file. adjust one photo for highlights, adjust one photo for shadows so u end up with 2 separate copies.
then u can combine either in CS or using a program like photomatix.