What there is to see: Doñana is a 1300 sq km wetland/coastal reserve spread over the provinces of Seville, Huelva and Cadiz. The park, Spain's most extensive wildlife reserve, changes with the seasons; the waters of its marismas (marshes) create temporary islands and sandbanks which draw thousands of breeding birds, especially in spring. It is home to the endangered Iberian lynx, Spanish imperial eagle, Adalbert's eagle, marbled teal and white-headed duck. There are eight visitor centres, three inside the park itself, from where you can see wildfowl, as well as wild boar, deer and, if you're really lucky, a lynx.