From Aven Colony Wiki
Megastructures are enormous and extremely expensive structures for enhancing your colony. Both megastructures are massive, with a 4x4 footpring and require lots of workers. The return is an extreme increase in morale.
List of buildings[edit | edit source]
|Earth history center||360||80||21||+36 Entertainment morale|
|Stadium||400||90||21||+36 Entertainment morale|