Doñana National Park in Andalusia occupies the right bank of the Guadalquivir river at its estuary on the Atlantic Ocean. It is notable for the great diversity of its biotopes, especially lagoons, marshlands, fixed and mobile dunes, scrub woodland and maquis. It is one of the largest heronries in the Mediterranean region and is the wintering site for more than 500,000 water fowl each year.

Parque Mineiro is part of Parque Natural do Vale do Guadiana. Guadiana is a natural park in south-eastern Portugal. This area with hills, plains and deep valleys around Serpa and Mértola shelters the Rio Guadiana, one of Portugal’s largest and most important rivers. Among its rich variety of flora and fauna are several rare or endangered species.

The Danube Delta is a remarkable wetland area feature constituting critical habitat for migratory birds and other animals. It is the major remaining wetland on the flyway between central and Eastern Europe and the Mediterranean and Middle East and Africa.