Within Spain, Doiiana is by far the largest and best known of the National Parks. It is also one of the most natural protected areas remaining in all of Europe and the one with the greatest influence from the Afrotropics;
Along with the World Heritage sites of Ichkeul, and the Danube Delta, Doiiana is one of the top three wetlands in the Western Palearctic in terms of diversity and abundance (Waddensea would be the fourth). It is of vastly higher natural value than the fourth European World Heritage wetland site at Srebarna;