I was in Normandy in April, it was on the bucket list. The Normandy American Cemetery is strikingly beautiful, manicured to the nth degree, all 9,388 gravestones perfectly aligned, all facing west towards home, you knew something profound and significant happened there. There are various cemeteries in the Normandy area, even German military cemeteries.
I have the near the same set of photos from 1997 when we took our boys to the U.K. and France. We made the entire lengths of the Normandy beaches. The concrete coastal defense battery site you depict appears to to be the same one we also visited that was eliminated by the U. S. battleships Arkansas and Texas. The design appeared formidable until one encounters the side that sustained the naval gunfire.
My jaw dropped when I first saw what 14-inch guns could do to many feet of combined earth and reinforced concrete as well as the artillery piece itself. I recall seeing a small split in the gun shield of the piece, puckering outward, that wouldn't admit one's fist. My Royal Marine host friend exclaimed: "That's where one of the gun crew went out."
https://defenceindepth.co/2021/06/30/battleships-d-day-and-naval-strategy/
The Texas (BB 35) is my avatar.
Pointe du Hoc, where the 5th Ranger BTN scaled the cliffs, is also nuts. The ground is just pockmarked with artillery holes.
The whole thing seems like ages ago despite being fairly recent. I recall seeing some vets at the recent 80th memorial and was reminded that it won't be very long before they, and everyone who fought in that war, will be gone. It made me quite sad thinking about it. A different world inhabited by different people.