These images were captured when my wife and I recently vacationed in Sedona, Arizona. Each photo is accompanied by an explanation, one of which explains why the photographer (me) should have been better.
Photo #1
This tree, which seems to be growing out of red rock, is about 6 - 9 inches (15 - 22cm) high. Yet it's proportions including the scaling on the bark seem exactly the same to my untrained eye as the fully developed trees that are 6 - 9 feet (2 -3 meters) high and larger. It's in the wild, so it presumably hasn't been shaped and trained by a horticulturist.
Photo #2
This tree is also growing out of red rock. To fully appreciate how alone it is, refer to my wife's photo displayed below it. The same tree is shown in her photo near the top of the rock formation on the left.
Notice that my wife did a far better job of making her photo than I did of making mine. You may not be able to tell at the size displayed here, but only the front part of the tree in my photo is in focus; the trunk and rear part are a little beyond the depth of field. That's for two reasons: I wasn't familiar enough with the depth of field when using my relatively new 300mm lens (mounted on a camera with a crop factor of 1.5) and when shooting such large objects at such great distances. Indeed, I'm not even used to having to judge such great distances. Considering both factors, you would think I would have checked the tree rather than just the rock formation for sharpness in my LCD. It's apparent that I didn't. Otherwise, I would have seen the problem and used a smaller aperture than my setting at f/8. There is absolutely no excuse for that kind of mistake for someone of my experience.
Photo #3 as a reference pertaining to Photo #2