This is one I did earlier – about ten years ago! I was decidedly chuffed with it at the time and the years have not diminished my chuffedness.
There is absolutely no back or middle ground here; all is foreground. It was a rather small waterfall, which you can judge by looking at the leaves of the sapling on the left of the picture. There are so many differing textures , mosses, shrubs, rocks, grasses and water, both still and moving. I had a field day didn’t I? The red-browns and oranges are working their spells on the greens and blues, but are totally outclassed by the moving water.
My eye goes to the flat rock bearing the brunt of the fall, then follows the crack in the rock to the bushes above. These curve over the fall where the topmost leaves of the sapling help the journey down to the stream. Sometimes the trip is in the reverse order – and I just love the way the waterfall curves to the right in a series of miniature falls.