Most popular fortifications NorwayØstfold Fortifications Østfold Fortifications Østfold mapSee on the map Østfold fortifications by popularity rating +HALDENNorwayFredriksten fortress+GAMLE FREDRIKSTADNorwayKongsten Fort See fortifications in other regions Akershus Finnmark Hordaland Nordland Oslo Østfold Rogaland Telemark Trøndelag Vestfold West Agder Other categories:MuseumsFortresses
