Menger sponge

The Menger sponge is a three-dimensional fractal object created through a repetitive process of removing smaller cubes from a larger cube. Starting with a solid cube, you divide it into 27 smaller cubes, remove the central cube and the six cubes at the centers of each face, and then repeat this process infinitely on each remaining smaller cube. This iterative process results in a highly intricate structure with a complex pattern of holes, demonstrating self-similarity at every scale. The Menger sponge is often studied in mathematics to explore concepts of infinity, geometry, and complexity.