Lovely photos. It seemed vaguely familiar, and when I looked up Etretat's place on the map, I realise I probably visited with my family at the age of 7 or 8, when we went camping near Le Harvre. That incredibly white sand!
The terrain is quite similar to parts of the south-eastern Scottish coast around the border with England. But the cliffs there are sort of ochre coloured, rather than white.