The Turtles
I have a memory of crossing the bridge over the river, and as I pass on the bridge I look down and there, beaneth the bridge are many very large turtles. Some surface just briefly and then return underwater. Others come onto things and enjoy the sun. Then some others appear to float, not submerged, and not surfaced. They are like living rocks, moving so slowly along, but you might think that you could hop across the river on their backs like a video game.
One of my favorite things to do was to lean over and endlessly watch these turtles, which I am sure frustrated my mother who had places to go. And I would occasionally drop a pebble into the water to see the ripples form and the turtles reaction.