Isla de Enmedio Natural Reserve
Situated in the heart of the Paraje Natural Marismas del Odiel, the 480-hectare Reserva Natural Isla de Enmedio can be found where its name suggests, in the middle of the Odiel nature reserve. The isla (island) is in fact a series of islands, created by tidal activity in the Odiel estuary, and is made up of saltwater marshes.
There is no access onto the islands themselves. The best place to view the reserve is from the causeway that crosses the Odiel marismas. To get here, follow signs out of Huelva city towards Punta Umbría. Cross the Río Odiel bridge and take the right fork for Ayamonte, then turn immediately left for Espigón. Instead of going on to the bridge again to return to Huelva, take the right turn - the Dique San Juan Carlos I road - which is a causeway that runs for about 20km through the centre of the Paraje Natural Marismas del Odiel. After 2km you'll pass the visitor's centre, the Centro de Visitantes Calatilla, on the left. You can view the Isla de Enmedio from here or continue along the causeway.
Alternatively, you can follow the walk from Playa La Bota and look out for Isla de Enmedio on your left, although you can't see it from here as closely as from the causeway.
The main birds you can see here are spoonbills and flamingoes.
The visitors' centre (959 509 011) has an exhibition about the marismas and information about footpaths and guided tours. You can also find information in the tourist offices in Huelva City and Punta Umbría.