Atomium

youmagine

The default parameter values accurately represent the actual dimensions of the Brussels Atomium, scaled down to 1/1000. You can easily adjust the sizes and decide whether to build a model of the entire Atomium building or just the iron atom. However, it's unlikely (for now) that this design will print well, as it would likely require an excessive amount of support material. I'm currently working on creating an alternative version with separate parts, which should make printing significantly easier.