At first I thought it was unnatural. I Imagined stone shapes cast in some exotic mix of concrete, sand and and gravel.
On closer inspection it appeared to indeed be real granite. I left with this image and a puzzle.
Later I learned that this new Adelaide Airport water feature is actually a complex sculpture made up of over six hundred individually carved granite pieces designed by artist Mark Stoner (what a great name) .
So real as that granite may very well be, its still all a little unnatural.
Photo: Robert Rath, 'Day 853, Unnatural Watercourse' 10s f/22 ISO320 21mm