Bioria, part of the Ria de Aveiro, is an area with a huge diversity of habitats that host a varied fauna and flora community. To protect this Natural Heritage, trails are being implemented along the seashores and the Salreu Tidal Creeks. The first is the Salreu Route, where you can admire the marshes and cultivated land, such as rice fields. The route is 8.5 km long and can be visited on foot or by bicycle, following the information signs.