The project reimagines the development of the urban landscape in dialogue with nature, where infrastructure isn’t built just for human necessities, but for all users of the city. Envisions a biological system in the Garibaldi railway that connects two green spaces: Biblioteca degli Alberi and future Parco Farini, through a green belt. This system consists of the creation of 28 biotrains, 8 typologies, designed as habitats inspired by Milan’s ecological oases, additionally a green wagon, to help regenerate biodiversity in Milan. This belt would improve the connection of the citizens with nature while rehabilitating neglected urban spaces and addressing the heat island problem.