In increasingly denser urban environments, there is a new-found interest in underused spaces as opportunities for further development. Representing up to 25% of cities' land area, rooftops are among the most exciting spatial resources. From sustainable infrastructure and urban farming to social spaces and cultural venues, the article looks into the potential of creating a multi-layered city through the activation of urban rooftops.
ON-A Architecture Studio has designed a proposal to cover the FC Barcelona football stadium with a rooftop park in Spain. Converting the stadium into a 26-hectare park, the project aims to re-nature the stadium's surrounding area. Called Nou Parc, the design features a new topography that would also create a forest for the city of Barcelona.