This is the magic hexagon. The numbers add up to 38 along each diagonal/vertical line.
It can be called the magic hexagon rather than a magic hexagon because there are no other hexagons numbered 1,2…n with this property, no matter how many layers the arrangement has.
(well, except for the one which is just one hexagon with ‘1’ written in it, and that’s hardly magical…)
(credit: Mathematical Gems I by Ross Honsberger)
Mandelbulb variation. 3D fractals are very new. A few years ago the famous Mandelbrot set was projected in 3D with some additional calculations like folding coordinates in an imaginary 4th D plane. This resulted in Mandelbulb, an organic like structure. Mandelbox or The Amazing Box derived from this. These fractals are truly amazing. One cannot imagine the things that can be found in them. Art, architecture, landscapes, anything. The universe is most probably a natural fractal.