I'm sure it exists on the net somewhere. The fractal shape is done with Fractint, using the 16 bit continuous potential features. It's an inverted Mandelbrot set. The silver texture is Silver1 in textures.inc. The sky is the usual bozo, but it's mapped onto a plane, not a sphere.
Floor is an imagemapped plane.
Unfortunately, Dan rarely releases his source code any more due to certain unscrupulous sorts using his images for commercial purposes without payment or even permission. Dan has taken a leave of absence from the POV Team because he wants to spend more time with his real life than answering questions. He asks that people not contact him with questions about POV-Ray. His pictures never fail to impress and he has undoubtedly produced some of the best pictures ever created with POV-Ray. You can find his images and scene files on many sites.