Minecraft Server: CanvasMC

CanvasMC.net | A 60 million block wide canvas that never resets, on which you can draw anything!

Upon spawning in you are given several colours to chose from that you can draw pixel art and anything really else that you want to with, the canvas will never reset and has a world border at 30 million blocks out each way so there's lots of space to draw and make your mark.