Nice movement capture of the waterfall. I like the light at the top of the falls. I think that the overlighted ferns take away from the dramatic shot of the falls. I like the color of the water though with the greens of the ferns and other vegetation. I would take the saturation of those greens down just a hair.
My first impression when seeing your image was, "Where's Tarzan?" Lol. I don't know why - perhaps it's just the jungle-like setting. I like the waterfall, composition and lighting. A good landscape.
This is so pretty, it makes me wish I were there. My only critique, and its a small one, is that to me, this seems slightly tilted. Otherwise, very beautifully done.