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