This village has three unusual characteristics: its annual pilgrimage or rosario that takes place at Pentecost; its stunning position at the very edge of a large expanse of water (which is puny in the hottest part of summer) where there are many species of water fowl together with marsh mares and cattle wading through the shallow water; its streets covered in sand (renewed nightly) making it seem like a wild west town and where the hoof prints of horses seem more in keeping than the tyre marks.
Damas bus from Sevilla towards Matalascanas
Unless you are massively interested in the rosario, avoid El Rocio at this time. In the improbable event of finding anywhere to stay, the cost rises to astronomical figures.
El Toruño restaurant is related to the hotel below but in a separate building.
El Toruño - a 4* hotel right by the lake with fabulous views at the back.
Four hour tours from the El Acebuche park centre off the road to Matalascañas through the Doñana National Park in 4x4 minibuses.