Bill Tavis designed this lovely vintage-style map of the familiar fractal shape, the Mandelbrot set. He is selling a poster version of the map, starting at the very reasonable price of $24. I don't usually highlight the price on this sort of thing, but an unauthorized seller on Amazon was selling poor-quality counterfeits of the map and even though it wasn't his fault, Tavis offered to replace any of the crappy maps for free. Great map, and apparently a great human who made it.
I found Tavis's map when I was searching for the creator of this similarish map that I found on Twitter (bigger here).
Anyone know who made this version? Jonny Laser made the map in the second image for VSauce (scroll down a bit). (thx, kirsten)