Can you think of an image, whether technical or nontechnical, available for viewing online that says a lot about what you think mathematics or a particular field of mathematics is all about?

For instance, some look at Hokusai's "Great Wave" as evoking a notion of fractals. http://en.wikipedia.org/wiki/File:Great_Wave_off_Kanagawa2.jpg

There is some interesting discussion of this here, http://www.squarecirclez.com/blog/math-in-art-hokusais-the-wave/595