Beautiful photo. I like especially the light in this one, it seems all a bit dark, this softens the whole scene in my eyes and gives the colour more intensity. Well done photo!
Hm, it might just be that your monitor is not calibrated properly. It shouldn't be too dark, looks fine on my screen. But assume you don't mean that parts of the tonal range a cut off?
Ah, I shouldn't have used dark to describe this, I guess. I did not really mean dark in form of dark shadows, but more the subtle difference. There are parts of the lake that are a bit lighter blue and the waterfalls themselves with the white seem a bit lighter in contrast to the rest of the surroundings and the deeper parts of the lake. That's what I meant when I was writing about dark.