There is a restaurant in Austin, and it has a large framed piece of art on its wall. I wasn't close enough to it to tell if it's a poster or painting, but it depicts an island, and the water in front of it. Instead of seeing the land and the water from above, the perspective is such that you can see both the calm little island, and the activity below, the sharks and fishes and underwater plants. You're seeing two worlds at once, air and water, touching each other, coexisting, yet so separate, so different.