breathtaking aerial view of the authie bay and berck beach at sunset, with golden light reflecting on tidal patterns, creating a

berck aerial drone coastal beach shoreline tidal sand sea ocean water reflection wetland nature sunset golden warm light sky clouds horizon low tide receding lagoon estuary habitat ecosystem environment fortmahon somme bay authie hautsdefrance marquenterre picardy northern caacute te daopale france europe mud slikke schorre salt marsh vast panoramic pasdecalais tourism travel wild untouched