Son is an old town, and a former municipality. It is located in Vestby municipality in Akershus.
Son Harbour 01
Oscarsborg Fortress is a coastal fortress in the Oslofjord, close to the town of Drøbak in Akershus County, Norway. The best known part is situated on two small islets: Nordre Kaholmen and Søndre Kaho
Oscarsborg Fortress' Main Island seen from the south-west.
Oberst Birger Eriksen, the commander of Oscarsborg on 9 April 1940.
Harbour Fortress on South Kaholmen. The 28 cm guns are on this island on the left, the torpedo battery to the right. Scars in the rock are over the torpedo exit tunnels. The Old Barracks in the background
One of the three 28 cm (11.0 in) main battery guns at Oscarsborg.