Four drawer file cabinets holding up a roof.
That's it.
Could be any number of cabinets, could be on a foundation, you might want to raise the roof.
The cabinets might side by side and fill the entire foot print, they may be walls or they might be columns.
Putting them on either side of an outdoor kitchen would utilize their heat and rodent resistance.
I think there's a house around here that has old appliances forming a border around the property. I'm not sure if it's an intentional move or just lack of storage space... It's kind of a creepy place so I haven't looked carefully, but maybe I'll go by slower next time I'm out walking or cycling.