This is a blueprint of a giant watermelon I designed in Minecraft. At full size it measures 17x17x17 blocks. It is symmetrical in all three dimensions, and is radially symmetrical by 90 degree turns in all three dimensions. It is more or less a giant spherical fruit. It can be constructed in just about any suitable material, but here it's been constructed with melon blocks for the rind, and three types of wool for the flesh and seeds. The blueprint here is shown in layers - there are only 9 shown because the largest layer is the center of the fruit and the other 8 layers extend in both directions from the center, making 17 layers total. At the bottom of the blueprint is a screenshot of how the melon can appear in-game (shown here using the Dokucraft High resource pack), both complete and in successive slices. Once built, the giant melon can be carved out on the inside to create a house.