Ideas for buildings for my game

I need creative ideas for buildings for my game, they can be buildings (normal) apartments (short) or houses (shorter but needs something to increase duration time)

[house]
a house made out of space objects and terrain

also its a platformer
^may use it when adjustable gravity releases

A really tall house, not a skyscraper or apartment, a REALLY tall house.

maybe a BIG house with a bunch of passage ways (Aka vents) that you can walk across