Mikeebee - was the crater/bunker etc at Pointe de Hoc (where the US rangers scaled the cliffs)? How anybody survived that on the german side was unbelievable! Craters 20 foot deep, and smashed reinforced 6ft concrete bunkers smashed like toys and to think the yanks climbed the cliffs.
i think it is true about leaving the bricks with holes in as a reminder. I've a photo of a house in Carentan what has an arc of 50mm cannon fire up the side. Must put some pics up on flickr!