Here is a couple Shadertoys that I wrote while traveling recently!
The first one, while coming back from Vancouver to San Francisco, is an exploration of what could be achieved deforming a texture. It is still a pure 2D shader, no raymarching or anything, just a UV deformation. The texture is calculated per pixel and it generates LEDs.
The Disco Tunnel
The second one, I wrote it recently while traveling to Japan. It is a very simple exploration of the Mandelbrot fractal.