Newton Fractal

A moiré pattern is an interference pattern created by overlaying two or more grids at an angle. The moiré pattern above is by Jacob Yerex.

The Dedekind Tessellation: a tessellation of the half-plane in hyperbolic triangles.

The fourth stellation of an icosahedron

Above are Cayley graphs of a finite Coxeter group on four generators embedded into the 3-sphere and then projected onto Euclidean space. If we could see these images in the hypersphere, the curved lines would be straight. More here.

Particles colliding in a particle accelerator