if you wanted the stone in the water to be the subject i would have gotten much closer to it. getting in closer creates pictures that don't look like everyday sights, which in turn creates a more interesting photo.
This would be better somewhat larger, you might also benefit from some contrast adjustment to let in a little more color with the grass. Otherwise, there isn't a lot of interest in this shot...
This has the makings of a really nice shot, but it needs more saturation in the colors and possible a different angle. The rock isn't really enough to create a focal point.