Not very common in the centre of the city, backyards nestled in the middle of city blocks are havens of peace that enhance the quality of life of residents. When laid out as gardens, they play an important environmental role, increasing the surface area of permeable ground and enhancing air quality, thermal comfort and biodiversity. This walking tour will take you to three backyards that are usually inaccessible to the public: two the result of carefully planned architectural projects, the other of spontaneous appropriation by local residents. With the buildings that surround them, both are testament to the industrial and urban history of the western part of the Pentagon. Along the way you will also explore the backyard of Fontainas block with its park, an important green space that is currently being redeveloped as part of the Jardin aux Fleurs sustainable development neighbourhood contract.