For the Expo 2008 in Zaragoza, a number of projects were also realized outside the exhibition grounds. One such project concentrated on enhancing the bank of the river Ebro. On the edge of the newly designed riverside park, the environmental centre is an element connecting the urban fabric to the leisure and recreational area situated five metres below it. Correspondingly, the environment and the landscape became the defining themes for the building concept. The architects extended the park’s planted areas to include the roofscape, while also using it to generate energy: the planted surfaces alternate with wooden ramps, bleachers for resting or for events, solar collectors and photovoltaic panels. From the foyer – which is situated on street level and is the crux of the building’s circulation system – visitors also have access to the roofscape. The foyer also separates the environmental centre’s multi-purpose hall from the administrative wing and leads to the garage situated on the lower park level. These different functions are also discernible from the exterior.