What if you flattened the road and had more bold rocks like a cliff closer to the foreground?
More of an ellipse shape for the road?
maybe these images of curved roads will help?
Maybe some deeper darker tones in the edges of the boulders, to define them more - if you compare some images of rocks/boulders they usually do have very dark shadows away from the light source. not straight black , but a deep mix of blue, purple, brown..
If that is bright sunlight on the lighthouse , then rocks,road etc will have some highlight & shadows to match it..