The American Mathematical Society has a neat page of large mathematical images that were created by merely walking in snow and sand. For example, here’s a time-lapse of the 9-hour construction of the Mandelbrot set on a beach (in between high tides and oblivious passers-by that walked through the artwork).
Published by John Quintanilla
I'm a Professor of Mathematics and a University Distinguished Teaching Professor at the University of North Texas. For eight years, I was co-director of Teach North Texas, UNT's program for preparing secondary teachers of mathematics and science. View all posts by John Quintanilla