The Bay of Authie
The river of the same name runs for 105 km through the Bay of Authie, in the Marquenterre Park on the coastal boundary of the Pas-de-Calais.
The Authie estuary
With family or friends, discover the Authie estuary, one of the last wild estuaries in Europe. . The Bay of Authie is a huge tidal marsh offering its nature-loving visitors a wide selection of walks: the Mollières, the Estran and the stretch of dunes across the fishermen's path all give you amazing views of the migrating birds and the incredible landscapes of the bay.