First impressions: the first one is not bad, my concern is that the colours look a bit over-saturated and the image itself seems a bit underexposed. The second one is not bad, but you haven't really captured the whole falls. You have cropped/cut off some of the falls on the left, and it would be nice to see more on the top right. The colours seem to be a bit oversaturated here as well, although not as bad, in my opinion, as the first one.
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WesternGuy