As sea levels are projected to rise by up to 1 meter by 2100, Where Does the Sand Go? reimagines coastlines and waterfront cities as living public landscapes. Curated by Filippo Mercuri through Gaud•e Project, it uses AI-generated visions to turn scientific research into shared futures. Through Piers, Levels and Bays, the project transforms erosion, seasonality and sea-level rise into spatial, ecological and civic opportunities.