Most popular fortresses NorwayAkershus Fortresses Akershus Fortresses Akershus mapSee on the map Akershus fortresses by popularity rating +OSCARSBORGNorwayOscarsborg Fortress See fortresses in other regions Akershus Finnmark Hordaland Nordland Oslo Østfold Rogaland Telemark Trøndelag Vestfold West Agder Other categories:Museums
