Drøbak Sound
Appearance
The Drøbak Sound (Norwegian:Drøbaksundet) is a sound where the Oslofjord narrows between Drøbak and Hurum. Outer Oslofjord, a term for the fjord south of the Drøbak Sound until it meets the Skagerrak, starts there.
The Drøbak Sound was previously guarded by the fortress Oscarsborg. During the Nazi German attack on Norway, was the German cruiser Blücher sunk by Norwegian defence forces in the sound west of the fortress 9 April 1940. [1] [2]. Now, it's a fortress museum and hotel located there. There is a ferry from Drøbak.