This is a 3D anaglyph image of a Mandelbrot set fractal. You will need red/cyan 3D glasses to view this image.
The image was created with FractalWorks, a free, high performance fractal renderer for Macintosh computers. You can download fractalworks and try it yourself at the FractalWorks download site.
If you have FractalWorks 0.6.0 or later you can recreate this image by clicking the link below:
Fractalworks plot Cauliflower 3D anaglyph
You can see a 2D version of this fractal at the following link:
Cauliflower 3D anaglyph 2D version