Fractals are cool. You can zoom in and it keeps reproducing itself for infinity. The famous one is the Mandlebrot plot which is in that 3rd pic of Moi's.
They aren't just pretty pictures either. A real life example is a coastline like along the Great Ocean Road. Technically it's something with a dimension that lies between the natural numbers 1, 2, 3, etc. All part of Chaos theory (and I don't mean Maxwell Smart
)