A destroyed German World War II coastal artillery bunker, identified by the designation 'OB 28cm Geschütz (zerst.)' (Oberbau 28cm Gun [destroyed]). Located in northern France near the English Channel, this site was part of the Atlantic Wall fortifications. The 'OB' prefix typically denotes a standard German 'Oberbau' (upper structure) design for heavy artillery casemates.
The specific 28cm caliber indicates it was designed to house large naval guns, such as the 28cm K5 or similar railway gun variants, for coastal defense against Allied naval forces and to dominate the Channel. The '(zerst.)' suffix in the location name confirms the structure was destroyed, likely during the Allied advance in 1944-1945 or in post-war demolition. The precise historical unit assignment and operational details for this specific position are not confirmed in available records.
Today, the site exists as a ruin and is of interest to military historians and urban explorers studying the Atlantic Wall's extensive coastal battery network.