Minecraft wiki entry for Far_Lands, associated text: The Far Lands comprise a very, very wide array of terrain generation bugs. The effects vary depending on which noise generator breaks (for traditional Far Lands, "low noise" and "high noise" are jointly responsible), as well as the player's distance on each axis (the "Edge Far Lands" refer to when noise breaks on only one axis, the "Corner Far Lands" on two, and the "Vertex Far Lands" on three).