Any old iron
Tin tabernacles is a lovely photo gallery of corrugated iron buildings. Mostly churches with some other odds and ends. In the late 1800s these structures were mass-produced and easily shipped to rapidly expanding settlements. Despite the hostile British climate quite a few survive, usually brightly-painted and lovingly cared for. If "wriggly tin" is your bag there's more at another Tin tabernacles site and the daddy of them all, the Corrugated Iron Club.