Grønsvik coastal artillery battery (HKB 16/974 Grönsviken) at Helgeland in Norway, was a German army coastal artillery battery, built between 1942 and 1945 as one of ten coastal batteries in Artillery group Sandnessjöen (Heeres-Küsten-Artillerie-Regiment 974). The coastal battery is today a museum whose purpose is to show the public that the Atlantic Wall in Norway was a lot more than the big naval batteries one can find scattered along the coast.