The Adelaide Bicenetennial Conservatory was designed by architect Guy Maron and built in 1988. It is of particular mathematical interest because the design is based on two identical cones sharing a common (vertical) base. This design feature leads not only to a striking structure, but also to economies of construction, since the curvature of the surface of a cone is constant. The surface is splayed at the ends to alow access to the conservatory. The conservatory makes a good starting point for investigating the volume and surface area of a cone, and the making of scale models.