This is a Mandelbrot set fractal taken from "Elephant Valley", which is the cleft of the main cardioid. It was plotted with FractalWorks, a free Macintosh fractal renderer I've written. If you would like to try it, there is a link to download it at the top of this fractal gallery

The plot is centered on 0.3600411759594346, -0.6847611119308467, at a width of about 2.86E-10.

If you have FractalWorks 4.0 or later installed, you can create this plot yourself by clicking the following: Fractalworks plot Elephant valley baby Mandelbrot