The adventures of "The Baron in the Trees" represent a key element of an investigation about the role of landscape in the work of Italo Calvino. There can be traced references to gardens' history and types, together with a specific discourse on the forms of forests and trees, with reflections on issues related to project language. Furthermore, it is worth noting sequences of city-countryside-forest with environmental implications. Due to the profound meaning of some aspects of the text, the latter seems to advocate a reading as a "landscape poem" regarding the relations between society and nature. This complex discourse is not confined to the idea of landscape in Calvino's work and draws a parallel between Cosimo's life and a landscape architect's experience.