The Marismas de Isla Cristina nature reserve are located at the mouth of the river Carreras in the province of Huelva, Andalusia. Created in 1989 the natural park has a surface area of 21.45 square kilometres shared between the municipalities of Ayamonte and Isla Cristina.
You can explore trails through the area on foot, horseback or by bike. Beginning from the nearby town of Ayamonte, one of them crosses the greenway and leads to an old tidal mill that was used to grind cereal crops. From here, the trail enters the marshland and you will come across interesting species.
There are a wide variety of bird species that feed, breed and nest on Isla Cristina and Ayamonte Marshes. One of them being the elegant avocet with its upturned, curved bill. This is also home to the unmistakable spoonbill its beak is spoon-shaped and turns yellow during the mating season. These birds feed on molluscs, crustaceans and fish. In September flamingos can be spotted in the marshland behind Punta Moral usually in large flocks.