One of the key characteristics of Mandalas is their beautiful complex, radial symmetry designs. Radial symmetry is when an object has the same appearance all the way around a central point. Fractals often have this radial symmetry as well, depending on the formula and parameters used to create the fractal.
The word Mandala is Sanskrit for whole world, or healing circle. The traditional Mandala is a complex design that is used in religious practices for meditation or contemplation. While I certainly do not suggest my fractal mandala designs have any spiritual power, I do hope you enjoy the art!