This project reclaims the infrastructural void between two highways and a canal in central Tehran by transforming it into a blue-green civic corridor that reconnects neighbourhoods and habitats while restoring the Alborz-fed stream. Blending circular urban systems (water, materials, energy) with a bio-digital toolkit (sensing, open data, digital twin), the design prioritises biodiversity, thermal comfort, and equitable public space. As a replicable prototype for Middle-Eastern megacities, Neropolis demonstrates how ecological restoration and smart urbanism can co-produce resilient, culturally rooted public realms.