Sydney, inner city industrial heritage. Caneite balls installed in local park (meters in diameter. I will have to go and measure them). They were used to pulp the sugar cane fibre (after the sugar, molasses alcohol had been extracted) to make Caneite (like masonite) in the 1950-1960's.The CSR factory was in Pyrmont from 1875 and played a large part in shaping it. I went to a talk today by the local history group.