No fair! I can't decide. These are all so incredible. I think it's between the Australian Monday, and the Matterhorn. They are both exquisite.
However, if I were FORCED to choose, I think I would pick @mibreit's Australian Monday, because of how the sun comes in over the sky and right between those two cliffs. Also, I lost my favorite ring on the Matterhorn at Disneyland when I was 8, so that's the deciding factor.
But those stingrays, and the asian peninsula, and the rolling dunes! And all the others! Breathtaking. All of them.