Marismas del Odiel, UNESCO Biosphere Reserve and Ramsar site in Huelva, Spain.
Marismas del Odiel is a wetland spanning about 7,200 hectares where the Tinto and Odiel rivers meet, composed of salt marshes and tidal flats. The Anastasio Sierra Visitor Centre offers information about walking routes, bird watching spots, and guided tours through this protected area.
The site was designated as a UNESCO Biosphere Reserve in 1983, marking formal recognition of its environmental value. This designation strengthened conservation efforts and gave these wetlands international status.
The local communities continue salt harvesting and sustainable fishing practices that have shaped how people interact with this natural space over time. You can see these traditional methods still in use today, reflecting a way of life tied to the marshes.
Access is best arranged through the Anastasio Sierra Visitor Centre, where you can learn about site conditions and book guided walks. The trails vary in difficulty, so it helps to ask beforehand about which route matches your comfort level.
The wetland hosts roughly one-third of Europe's spoonbill population and serves as a critical resting point for more than 200 bird species during migration. This concentration of birds makes it one of Europe's most significant places for birdwatchers.
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