AERIAL VIEW OF RARE WW2 GERMAN BUNKER IN FRENCH LAKE This has to be one of the most photogenic gun casemates on the whole of the Atlantikwall in Northern France - but it’s well off the tourist route. Stp Firmin-Bihen HKB gun batterie can only be accessed with permission as it’s a dangerous, working sand extraction facility and the bunkers are all located on private land. Situated just north of Le Crotoy in the Baie de Somme region, Bihen features three of these amazing-looking R688 casemates whi