Speaking of spacious:
WM's "SuperStores" are gigantic, but since they have so many aisles and shelves that reach up so high, it's hard to get a feeling for just how big they are.
There's a furniture store in a mall near me that used to be a WM. Since it's now filled with sofas and chairs, and is laid out in a straight line, you get the feeling that the place falls off with the curvature of the earth in every direction. If they built an indoor running track around the inside periphery, it'd probably be two or three miles for each lap.