Wow, the look of the water is absolutely amazing in this one. The only thing I would have changed would be to lower the exposure just a bit so as to not blow out the flowing water. That's hardly something to nit pick about though.
Composition is a little agressive. That is; instead of drawing to itself, if advances towards the viewer. Not that it's a bad thing. It's just a matter of personal preference/taste. Additionally, the picture is overexposed, therefore the water loses all its texture and instead of appearing to be a silky smooth flow, it turns into a blown out, white blob. I'd try to shoot this scene when the light is diffused and even, e.g. on an overcast day, or when the sun is low enough to provide front lighting (Assuming that the waterfall faces either east or west, and there's nothing around that would block the light).
What's the exposure length on this? It's perfect for this category. A little longer would've been too whited out, a hair less would've looked good but not quite as dreamy.
This is a lovely waterfall, even though the focus isn't quite right.
However, it is just that - a very earthly waterfall - doesn't say fantasy world to me at all :-(