Most popular fortresses FranceHauts-de-France Fortresses Hauts-de-france Fortresses Hauts-de-France mapSee on the map Hauts-de-france fortresses by popularity rating +MONTREUILFranceCitadel of Montreuil-sur-Mer+ARRASFranceCitadel of Arras+CALAISFranceFort Nieulay+LILLEFranceCitadel of Lille+CALAISFranceFort Risban+SECLINFranceFort Seclin See fortresses in other regions Auvergne-Rhône-Alpes Bourgogne-Franche-Comté Brittany Centre-Val de Loire Corsica Grand Est Hauts-de-France Normandy Nouvelle-Aquitaine Occitanie Provence-Alpes-Côte d'Azur Other categories:MuseumsChurchesBeachesGardensCastlesPublic squaresParksCathedralsMonasteriesMilitary museumsAnimalsBoardwalksLookoutsAquariumsBotanical GardensMonuments