Karin, I don't have many images of trees, other than forests. However, I did find these 2 shots.
The first was taken a few winters ago. I was on a group nature walk in a local state forest. The day was miserable - cold and dreary, no birds or wildlife worth shooting. I got it into my head to shoot upward.
The second was taken on a short walk at the Grand Canyon. People all over the place! I spotted this lone tree, and just went for it.
Well MadMike, if you only have 2 you had 2 good ones. Love the looking up.