Truthfully the most spooky area in all of Diablo 3’s setting, with spooky enemies such as unicorns, teddy bears, and pink flowers. In order to enter into this weird landscape, you have to acquire a black mushroom, Leoric’s shinbone, liquid rainbow, Wirt’s bell, Gibbering gemstone, and the staff of herding. Once
you have grinded your time away to get those items, you have to have the Staff of Herding in your inventory and head over to the Old Tristin Road. There will be a cow and a portal will open and take you to Whimsyshire..