So what’s that? A Mandelbulb?? Wikipedia explains it. These two images were done with “Mandelbulber”, a nice piece of Open Source software. You can get it here. Another interesting link: Mandelbulb: The Unravelling of the Real 3D Mandelbrot Fractal.
Abstract 3D sculpture created with Vue 6 Infinite. Click on the preview for the 2560×1600 version. A 1600×1200 render is available here.