This 72-sq-km reserve across the Odiel estuary from Huelva is a uniquely productive tidal marsh system. A strategic point in the migratory flyways between Europe and Africa, it harbours a large, varied bird population, including up to 1000 blushing-pink greater flamingos in winter, plus ospreys, grey and purple herons, and many other waterfowl.
The marshes can be reached by car along the A497 Punta Umbría road west from Huelva. Cross either of the parallel bridges over Río Odiel, then follow ‘PN Marismas del Odiel’ signs to reach the Centro de Visitantes Anastasio Senra , which has an extensive exhibit on the ecology and history of the zone. Several paths to good birdwatching spots strike off the road through the reserve. Near the visitor center, the Sendero Calatilla de Bacuta is a 750m walk along the ancient salt flats, at the end of which are views to a small island harbouring the largest spoonbill nesting colony on the Iberian peninsula.
