Classical Folly by Structures. $25.99. In architecture, a folly is a decorative building used as an ornament in the garden. The Classical Folly is such a building with a metal scrolled roof supported by resin pillars. On top of the roof a weather vane points out the direction of the wind. To create a formal look, in the center of the folly, place a Classic Garden Pot planted with Hens and Chicks. If your taste is more casual, the Tiny Bistro Set will fit in the center.