Oh, this is fun! I love how simple the composition it- with the really saturated colors, I think if it was any busier it would seem cluttered and distracting. There's just enough in the photo for it to be interesting, but not too much. The wall of trees is a really great element here- they kind of anchor your focus and serve to frame where you're supposed to look, but since they're of varying heights and almost wave across the photo, they add an element of interest as well. And, of course, those colors are just lovely.