They might not be as massive as buildings, but these mini-mecha are still impressive in their respective anime shows.

Appleseed takes place in the 22nd century ... organization in the utopian city of Olympus, the new world's most powerful state. Roughly one half of Olympus's population are bionically augmented.

In the fallout of a global nuclear war, humans coexist with bioroids—clones made of the best human DNA—in the thriving city of Olympus. Mechsuit mercenary Deunan and her cyborg partner ...