SpongeScapes helps public authorities, practitioners, the private sector and civil society to co-design and co-create sponge strategies in the landscapes where they work and live. To enable this shared vision, two SpongeLabs are being established in two of our 14 case studies as platforms for active transdisciplinary collaboration: Aa and Maas (Aa-dal Noord) in the Netherlands and Lèze catchment in France. The SpongeLabs will involve local and traditional knowledge holders, land and resource users, stakeholders and private and public decision makers from each case study.