The retention basins, constructed between 1975 and 1980 to control the floodwaters of the Secchia river, consist of about 200 hectares of water and islands, where birds of various species winter and nest (including the grey heron, little egret, kestrel and widgeon). The entire area has been incorporated in the 1500 hectares of the Riverside Park, which also includes farmland, sand and gravel quarries, and areas for water sports. Bird-watching and educational visits are encouraged, with informative notices and a Visitors' Centre in the Corte di Rubiera building, offering exhibitions, videos and publications.