Recently 
chikuru posted about Mandelbrot, which was a nice coincidence, because I had recently been wondering if there were any representations of the Mandelbrot set in 3 dimensional space. It turns out that there is, and unsurprisingly it is on wikipedia.I am not sure if this is really a 3D Mandelbrot set, since it still uses the 2D equation, but the images are still as beautiful as the 2 dimensional version. You can learn more about it here on the discoverer's web site.
Image credits and licensing information.
