Doñana National Park is a natural reserve in southern Spain. It is in Andalusia, in the provinces of Huelva and Seville. It is in Las Marismas, where the Guadalquivir River flows into the Atlantic Ocean. The park covers . Of that area, are protected. The park has marshes, shallow streams, and sand dunes. It was named as a nature reserve in 1969. The World Wildlife Fund and the Spanish government bought a section of marshes to protect it. The eco-system has been in danger from draining the marshes, using river water to irrigate land along the coast, and making tourist facilities bigger. The park is named after Doña Ana de Silva y Mendoza, the wife of Alonso Pérez de Guzmán, 7th Duke of Medina Sidonia.