Advertisement Earlier this year, Maree Clarke visited cavernous spaces deep beneath Melbourne. In fluoro vest and hard-hat, Clarke contemplated an underground site below St Kilda Road, near the Shrine. She saw this upside-down world with new eyes, and sized up a huge tunnelling machine, responsible for extracting vast quantities of soil and rock. Little wonder Clarke has been thinking big and deep ever since. Many would be overwhelmed by the scale of her own project: as the commissioned line-wide artist for the $11 billion Metro Tunnel Project, she is creating a single artwork connecting the five new underground railway stations – Arden, Parkville, State Library, Town Hall and Anzac.