Pixel art

Escher's Waterfall Block
Escher's Waterfall Block
by Brian Gambrell (ToshioMagic)

The image was reduced. Click on the image above to see it in original size (2362 x 1509, 112 KB).

Except Escher's Waterfall, also you can see endless stairs, impossible junction of rectangles and a variation of impossible triangle, which was designed by Oscar Reutersvärd.

The image was found at http://toshiomagic.deviantart.com/art/Eshcer-s-Waterfall-Block-67562700