"Blücher" was a German cruiser that took part in the German invasion of Norway and was sunk on 9 April 1940 in Drøbaksundet. Blücher was sunk by the batteries and torpedoes at Oscarsborg fortress and one of the anchors was raised and unveiled in Badeparken in 1990. The anchor is located right next to the bust of Colonel Birger Eriksen in the Kirkeparken, in the Bathing Park in Drøbak.