Guérande salt marshes, Nature reserve in La Baule-Escoublac, France
The Guérande salt marshes span around 2,000 hectares and form a network of shallow basins divided between the Traict du Croisic area and the northern Mès salt marshes. The site is crisscrossed by dikes and displays a patchwork of water surfaces at different stages of salt production.
Salt harvesting in these marshes began long before the 9th century, with roughly 80 percent of today's area already in active use by 1500. This sustained exploitation demonstrates the region's continued importance for salt production across many centuries.
Local salt workers called paludiers maintain these marshes through traditional techniques and harvest salt certified with the Red Label distinction. Visitors can observe how these workers operate across the shallow pools, keeping the harvesting methods alive as part of daily work.
Several visitor centers including Terre de Sel, the Paludiers House in Guérande, and the Salt Marshes Museum in Batz-sur-Mer offer guided tours and information about the area. Spring and summer provide the best visiting conditions when salt harvesting is underway and weather permits comfortable exploration of the paths.
The site hosts around 180 bird species and shifts colors throughout the day, appearing light gray in the morning, white at noon, and purple at sunset. These color changes result from varying water levels and salt concentrations across the different basins.
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