Since 1995 a worked-out china clay pit in St. Austell, Cornwall has been transformed into a leading tourist attraction and horticultural centre, the Eden Project. The first structures to be completed were the world’s largest climatically controlled biomes: two massive, ETFE foil-clad, steel geodesic structures covering a plan area of 22,500 square metres. A visitor centre, restaurant and office building followed, all designed on sustainable principles. The latest building to be completed on the site is a new education and interpretation centre, known as The Core. It provides a much-needed education facility, with four classrooms and workshop spaces, staff accommodation, a doubleheight exhibition hall and a cafe.