Fractals05 of 113
Menger sponge
Karl Menger, 1926
The carpet in three dimensions: split the cube into 27 and remove the centre and the six face centres. In the limit the sponge has no volume and infinite surface area.
dim = log 20 / log 3 ≈ 2.7268
On mathcurve.com as Éponge de Menger