This dataset features illustrations in raster format that represent different Nature Based Solutions (NBS) for urban water management, organized into two main categories depending on the type of water: wastewater treatment and stormwater management. The illustrations explain each solution in a simple manner, using cross-sectional views. This approach allows for an observation of both the internal functioning of the system and its external appearance. The images are designed to provide a clear understanding of the water treatment or management process, as well as the design and external structure of each solution.