The water installation, Cascade Waterfall, softens the High Court's ceremonial ramp and forecourt area. It was designed by an architect who specialised in fountain design, Robert Raymond Woodward AM (1923–2010). A tessellated surface of cascading rapids and tranquil pools is created when water squirted from jets on the forecourt level flows down over granite blocks, resembling an alpine stream. Made from Imperial Black Speckled Granite from Black Hill in South Australia, it runs on captured rainwater and was inspired by Australian volcanic rock formations.