Thingiverse User underst0rm just posted this 'I made one' that blows my mind! It's photo of a printed copy of my Gothic Cathedral Playset under and electron microscope! Those little squares in the background are only 2um long. This is without a doubt the coolest 'i made one' i've gotten yet.
The 3D Printer
underst0rm describes his printer as a 'Selfbuilt 2PP machine' or a two-photon lithography system, with a resolution of 0.3 micrometer and a layer height of 100nm. I'd love the learn more about his machine and what it's designed to do.
Correction: an early version of this post talked about 100um layer height. That was an error I attribute it to a totally blown mind. The correct units are 100nm - nanometers, not 100um - micrometers.