Micropolis

The members of TwinLUG, a LEGO Users Group based in the Twin Cities, pioneered the micropolis standard. This set of standards allows different builders to make microscale (that is, much smaller than minifig-scale) units and then fit them all together to make a collaborative city layout, such as this one. Why feature this, you ask? Look closely and you'll see both the Superfriends' Hall of Justice and Fantastic Four's Baxter Building. Universes collide!