This paper argues that a recent resurgence in Australian spatial planning has been superseded by a resort to infrastructure to address urban problems. The paper uses case studies of the Melbourne and South East Queensland (Brisbane) metropolitan regions to chart the renewal of new spatial planning, after a period of neglect. This paper then shows this spatial planning renewal has given way to a new emphasis on urban infrastructure planning as the primary mode of intervention in these cities. The infrastructure turn raises important questions about the spatial planning and infrastructure of cities within a new era of global strategic challenges.