It makes me think of waves breaking on the shore. Perhaps the old route out of Wellington with the road next to the sea and the waves that sometimes broke over the wall onto the road. The green is like an ominous stormy sky from a story book, and the darker bit between the lighter top and the waves at the bottom is like the swell of the sea. There's probably a monster in the water.
This is the Manawatū River Loop, which I'm only just realising is some weird side loop that comes off the river and back on. It passes next to Foxton, and the photo is taken from near the River Loop Reserve Playground, which I'm told has the best slide in the world, but that was just one kid's opinion.