Hellinikon -Greece was the international airport of Athens; Greece for sixty years up until 2001;In 2005; architects David Serero; Elena Fernandez and landscape architect Philippe Coignet won the international competition to design a metropolitan park on the former site of the Hellenikon Airport.The competition sponsored by UIA (International Union of Architects); the Greek Ministry of Environment and the Organization for the Planning and Environmental Protection of Athens (ORSA). The project was further developed in 2006 and 2007 by this team trough two development phases with the planning organizations of Athens.Serero誷 team developed a strategy to landscape and urbanize the 530 hectares of the Hellenikon site by using natural running water patterns on the site as a concept to design the largest sustainable park in Europe. The water used by the park is effectively originating up to 80% of water collected naturally on the site. 襍oftscapes?are irrigated corridors that channel and collect rainwater of the site and from basin of the surrounding hills. These strips integrate a playful work on artificial topography that both guides the water and create terraces and slopes for the park activities and programmes. Today; the main terminal is used for exhibitions and concerts.