Just thought you bonsai folks might appreciate this photo:
https://www.city-data.com/forum/san-antonio/1348951-sa-miniature-tree-makes-best-images.html
(you have to scroll down a little on the page to get to the photo)
It is a naturally occurring miniature tree. I guess you can't call it bonsai, since that means potted and implies intentional training on the part of the grower, but I thought it was very interesting....