Huelva marshlands — from the Guadiana to Doñana

• Marisma — tidal saltmarsh. Flooded and emptied by the sea, not a freshwater lake.
• Flecha — a sand spit. El Rompido is the long one on this coast.
• Lucio — a seasonal pool inside Doñana. Full after rain, cracked in late summer.

The route starts at the Portuguese border. Isla Canela faces Portugal across the Guadiana: beaches on the outer shore, marsh of the Guadiana and Carreras behind them. Ayamonte is the border town — ferry or bridge, a hill of tiled roofs, and a working estuary.

Isla Cristina still lives off the fleet. The marshes around the harbour hold waders and herons if you walk the raised paths instead of only the market. La Antilla is the next beach strip. El Terron is a small quay on the same water. None of these need a long stop. They set the pattern: sand in front, mud and birds behind.

• Isla Canela beaches — map
• Guadiana and Carreras marshes — map
• Ayamonte and the Guadiana — map
• Isla Cristina wetlands — map
• La Antilla — map
• El Terron — map

A little inland, Lepe sits on ground that turns salty as it nears the sea. Fruit is the crop; the marsh is the edge. Cartaya looks onto the River Piedras. The water worth stopping for is the estuary and the sand spit.

El Rompido is the fishing village on that spit — a flecha of sand that grows east and leaves a sheltered creek behind it. The plants change as you walk: dune first, then saltmarsh. A short boat crossing of the Piedras is worth doing. Laguna del Portil, a little further east, is a lagoon used by birds on passage. Punta Umbria and Aljaraque close this stretch towards Huelva: resort beach in front, Odiel marsh beginning behind.

• Piedras marshes, Cartaya — map
• El Rompido — map
• Laguna del Portil — map
• Punta Umbria — map

Beside Huelva the Odiel and the Tinto spread into the Marismas del Odiel: tidal channels and salt pans, and one of the province’s main wetlands. Flamingos use it. So do spoonbills. The river mouth is industrial, and the birds still come. It is not a pretty postcard. It is a working marsh.

El Espigon is a man-made arm of sand and rock pushed into the Atlantic. From the tip you can see how the sea moves the shore, how dunes pile up opposite, and how sea birds use the point. The Odiel dunes face the spit. An hour here is enough.

• Playa del Espigon — map
• Marismas del Odiel — map
• Odiel dunes — map

The Tinto mouth holds a different history. La Rabida is the monastery where Columbus waited, the replica caravels and a botanical garden. It is not a marsh walk. It is the stop if you are already on this bank.

East of the rivers the shore becomes cliff and dune. Mazagon sits under sandy bluffs. Torre de la Higuera, by Matalascanas, is a ruined watchtower in that dune line — the edge of Doñana as the public beach sees it.

Doñana is why marsh still matters on this coast: dunes, pine, juniper wood, seasonal pools (lucios) and the great marisma that fills and dries with the year. Lynx live here; you are more likely to see a heron. For the park use the visitor centres — El Acebuche for the hides and the briefing, El Acebron for a walk under cork oaks beside a stream. The inner marsh is entered on booked tours, not by driving after a map pin.

The village of El Rocio stands on sand at the marsh edge. Most of the year it is a quiet white town and a door into Doñana. At Pentecost it changes completely: brotherhoods arrive on horseback and in wagons for the pilgrimage of the Virgin of El Rocio, the streets fill, and the marsh edge becomes a festival. That week is the moment if you want one of Andalusia’s great popular celebrations. It is a poor week for birdwatching — noise, people and closed access.

• Monastery of La Rabida — map
• Wharf of the Caravels — map
• Mazagon dunes — map
• Torre de la Higuera — map
• El Acebuche — map
• El Acebron — map
• Doñana National Park — map