Let's take a trip to nanometer world of processors and admire beautiful silicon crystals, modern and not so – from 10 microns to invisible in a light microscope 7 nanometers.
Chips in high resolution - https://www.flickr.com/photos/130561288@N04/albums
Intel 4004 Visual Transistor-level Simulation: https://www.youtube.com/watch?v=0Fixr39X8S4