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