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.
Seven kilometres from Punta Umbría is the small resort of El Portil, with its 13-hectare reserve of a small freshwater lagoon, the Reserva Natural Laguna de El Portil. The reserve is most well known for its population of chameleons.
The Paraje Natural Sierra Pelada y Rivera del Aserrador is the third largest protected area in Huelva Province. Located in the foothills of the Sierra Morena close to the Portuguese border, it covers 12 sq km of wooded hills south of Aroche and is also just south of the Parque Natural Sierra de Aracena y Picos de Aroche.
This 718ha area southwest of Aroche is a little-visited protected area due to its relatively remote location and rough forestry tracks leading to it. It can be reached via the dirt road that links Aroche with the sparsely populated hamlet El Mustio, that gives access to the Paraje Natural Sierra Pelada.
It is situated west of Huelva, around the minor resort and fishing village of El Rompido. The Piedras river has formed an estuary surrounded by marshlands. Where the river meets the Atlantic Ocean a long sandy spit has formed, called the Barra or Flecha del Rompido.
The Paraje Natural de las Marismas del Odiel is the second most significant wetland reserve in Andalucía after the Parque Nacional de Doñana. This large estuary and marshland of the Odiel and Tinto rivers covers 72-sq-km between Huelva City, Punta Umbría, Gibraleón and Aljaraque. It was granted protected status in 1989. The best time to visit is in spring during the breeding season and in winter when there are lots of waterfowl.
The marshland nature reserve of the Marismas de Isla Cristina is situated between the northern edge of Isla Cristina village and the Carreras estuary to the east and Ayamonte and the Guadiana estuary to the west. Within its 2.1 sq km is a variety of habitats and an impressive range of birds.