At the edge of the map there's a comic with a Mr. potato head and a mushroom on top of him near the workshop with the grill. I found it with a glitch that let me fly, usually it only lets me fly for a short amount of time but now it let me fly for as long as I wanted. so I explored and came across an absolute masterpiece of art near the workshop when I found it I found it I laughed it off and messaged the forums.