Minecraft wiki entry for Enderman, associated text: Each teleportation attempt chooses a random destination 32 blocks along each axis (i.e. a 64×64×64 cube centered on the current position). It then seeks downward from the chosen destination until the block below is made of a movement-blocking material. Exceptions exist such as carpet that is not above a block made of a movement-blocking material, lily pads, and snow layers stacked 10 blocks deep or more as their materials are not flagged as blocking movement even though the blocks themselves do. The teleportation attempt succeeds if no liquid or solid blocks prevent them from standing at the destination. Thus, endermen need at least three non-solid blocks above the destination to successfully teleport. Endermen do not teleport to waterlogged blocks unless there is a ceiling with a liquid above it.[4]