Blizzard’s sense of humor shines through once again. A secret Diablo 3 level has been found. It’s dubbed Whimsyshire and makes fun of those who complained that the game was too colorful. It also harkens back to Diablo 2’s secret cow level.
As you have already understood by now, Whimsyshire is a bright green, happy cartoon world of ponies, cupcakes, fluffy clouds, rainbows, and other things that make me puke.
Check out the video below. This page on DiabloWiki explains how to get there.