Urban rivers across the world are being turned from polluted backwaters into “blue space” and public amenities. Such transformations are unfolding in the global North and South, in major metropolises and in small towns. As rivers are repurposed for new uses, considerable political, social, and environmental consequences can ensue. River restoration projects can be unstable and exclusionary, but they can also provide opportunities to work toward more spatially integrated and sustainable cities. This volume of Projections brings together experiences from France, Thailand, Israel, and the United States to shed new light on the political economies and political ecologies of river restoration and urban development.