A military bunker or coastal defense position located near Gothenburg, Sweden, at coordinates 56.0658°N, 12.6864°E. The designation 'Värn 1804' suggests a possible connection to Swedish coastal artillery, with 'Kg III' potentially referencing a specific gun model or battery unit. The site is situated in a region with a long history of Swedish coastal fortifications, particularly during the 20th century.
Based on the available information, its precise historical role, construction date, and current condition cannot be confirmed. Sweden maintained extensive coastal defense systems throughout the Cold War, and this location may be part of that legacy. Further archival or on-site verification would be required to establish definitive details about its structure, armament, or operational period.