Pixel art
Calv
Here we see a new variation of Escher's Waterfall with gargoyles at the top. There's no water in this version of the image, but you can see the same animated image with falling water and rotating mill-wheel.
Another image shows a construction, which was created by aliens. We cannot imagine what does this building and what capabilities it have in it's impossible triangles and other impossible figures.
Images were found at