Granville's bunker sites are made up of around a dozen Widerstandsnests with Wn05 - located at the point of the cliffs on Pointe du Roc - boasting the largest number of concrete constructions.
This Kriegsmarine batterie has a commanding view over the sea with the Iles Chausey, British Channel islands, and Brittany all visible on a clear day - hence the location of a modern semaphore station.
Many of the bunkers and gun emplacements are still here, although some are in a destroyed state, but most are still in good condition with several open to visitors.
Wn05 originally featured four M158 type open emplacements for captured 120mm, First World War guns.
These were later followed by four R671 type casemates for 105mm guns and a R612 casemate housing a 7.5cm field cannon, all covering the coast and the vital port area to the south east of the pointe.
All four of the R671s are still visitable but only one of the M158 and it's attached R656 personnel bunker are visible the other two now buried with only edges of their roofs able to be seen.
One R671 has been repainted to match original its wartime camouflage scheme - that of a small house.
A M162a Leitstand bunker provided the observation and this still remains although now it is the foundation of the semaphore station.
A walk back along the cliffs in both directions from the point takes you to the other Widerstandsnests nearby where there are a mix of defensive positions, air-raid shelters, and personnel shelters.
In mid-2026 a new association of historians took over the running of the site and have been working hard to open up the buildings for guided tours for the public. We had a sneak preview of the work so far and can highly recommend a visit when the reopen in 2027.