walk in Boulogne-sur-Mer or Boulogne is a city and port in the Côte d'Opale region of Hauts-de-France. It is the second largest place on the Cote D'Opale after Calais. It is the estuary of the Liane river.
The city's origins are as a medieval port protected by a castle up on the hill, which stands to this day, now a museum. After extensive allied bombing during World War II the city and the port were rebuilt post-war thus creating what is now known as the Old Town (inside the castle walls which largely escaped the destruction) and the New Town at the riverside and on the seafront.
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