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Tagscoudraie
1 place carries this tag, across every kind and continent it appears in.
🇫🇷 France · Hydraulic works
Iron Age (Hallstatt–La Tène) to early Gallo-Roman · Vendée maritime salt artisans (Armorican → Picton maritime)
Atlantic salt-marsh canal network (2.4 km, 2-4 m wide) feeding 180 evaporation pans producing 30 t sea salt/yr (Iron Age).