In Diablo II, what is the name of the secret area filled with hostile cows?

In Diablo II, the secret area filled with hostile cows is called the Secret Cow Level.

The Secret Cow Level is a hidden bonus area populated by armed Hell Bovines. It became one of Diablo II’s most recognizable features because it combines a deliberately humorous premise with valuable opportunities for fighting monsters and finding loot.

Players traditionally opened the level by combining Wirt’s Leg with a Tome of Town Portal in the Horadric Cube. The recipe works after the player has completed the game’s relevant difficulty, although later versions changed some details about repeatedly accessing the area and killing its Cow King.

The level originated from a long-running joke among Diablo players who wondered whether an unexplained cow could be clicked or whether a cow-filled area existed. It is often confused with the hidden Whimsyshire area in Diablo III, which uses a different setting, access method, and visual style.