At 6.5 mega litres it is the largest water tower in the southern hemisphere. It is a post-tensioned concrete cone on a 4m diameter stem with a 10m cube mass concrete base. The cone meets the stem at the surface of a pond, giving a floating effect to the massive concrete form. A spiral staircase runs up the centre like a straw in a glass. Provision has been made for a revolving restaurant at the top of the tower.