Unless, of course, you're talking about Romanesco broccoli, one of the most commonly cited examples of fractals in nature, which happens to be the first example in this neat article:
14 Amazing Fractals Found in Nature
The "bottled lightning" picture is my favorite:
It was made by subjecting glass to a strong electrical current. A similar fractal shown in the article was made by putting an electric current through nails stuck in a wet plank, which burns fractal-like branching marks in the wood. I'm definitely going to try that one if I can get my hands on the right tools.
"Clouds are not spheres, mountains are not cones, coastlines are not
circles, and bark is not smooth, nor does lightning travel in a straight
line... Nature exhibits not simply a higher degree but an altogether
different level of complexity." - Benoit Mandelbrot
