The Ebro Delta is an immense alluvial plain covering an area of some 320 sq km, the results of thousands of years of interaction between the River Ebro and the Mediterranean Sea. The landscape of the Delta today is dominated by the rice fields that play such an important part in its ecological cycle. On the one hand, the fact that they remain flooded for a large part of the year minimizes the problem of the salinity in the subsoil, and on the other, they create temporary lakes that attract the migratory birds that spend the winter in the Delta. The natural areas that form part of the Nature Park cover some 800 hectares and include coastal lagoons, sand dunes, islands, and the El Fangar and La Banya peninsulas. They are home to an exceptional flora and fauna, which visitors can observe from the lookout point and hides located at different spots.

The best-known aspect of the Delta's fauna is the spectacular presence of birds, including a large colony of flamingos. To date, more than 350 species have been observed – more than 60% of all the species in Europe. In winter up to 200,000 aquatic birds can be counted, while in spring and summer more than eighty species nest there. The different species of flora have adapted to a wide diversity of habitats: wetlands (salt and fresh water, flooded to a greater or lesser extent), sand, dunes, etc.