Minecraft wiki entry for Building_a_metropolis, associated text: Shrunk: The inhabitants of the city may appear normal-sized to the player, but they would exist in this scenario as tiny people in a giant world. Part of creating such a city would be making the area around the city to show how small the inhabitants of the city are. Plant large jungle or spruce trees around the city, and spawn giants and huge slimes with using commands. You can also build large statues depicting other mobs.