One thing that Qoheleth is comfortable talking about is the natural world. Things occur as they always have, uninfluenced by the activities and presence of mankind.
The sun rises and the sun goes down
1:5 NA "The sun rises and the sun goes down: then it presses on to the place where it rises"
I decided that a sundial would be the best way to depict the path of the sun through the sky. I like to be accurate in drawing, but couldn't find a working public sundial to draw from. So I got a library book, learned the geometry needed to design one for my location, built it from scrap wood, and set it up in proper alignment.
1:7 NA "All rivers go to the sea, yet never does the sea become full. To the places where they go, the rivers keep on going."
To me the Grand Canyon will always be the best symbol of a near eternal continuous flow of a river. Not an actual scene, but bits and pieces of canyon geology arranged for the composition.
11:3 NA "When the clouds are full they pour out rain upon the earth. Whether a tree falls to the south or to the north, wherever it falls, there shall it lie."
This image is from an actual tree that fell outside my house; it fell to the south, into some deep woods, not the north where it would have crushed my house. The point of view is standing on the downed trunk of the tree, with the leafy ground immediately beneath it.