The closest most of us get to fungus is on the mushroom shelf at the grocery store or on the unidentifiable stuff at the back of the refrigerator crisper drawer (yeah, we know about that), and most of us are happy that way. Did you ever consider building a parking garage out of it?

A group of researchers in London hopes to make that possible and they’re actively trying to grow buildings out of different kinds of fungi. They have great precedents to work with–other buildings have been constructed out of glass, trash, and even rice. Curious about the weirdest things people have built with? We were too, and dove in for the October issue of Parking & Mobility. Check out our round-up of five weird construction materials here. Gross or cool? Let us know.