We had a leisurely breakfast and then visited the Blockhouse d'Eperlèques, in whose car park we had spent the night. The museum turned out to be basically a walk around, and in, the enormous structure, with various stops where sound broadcasts (in a variety of languages, including English) told you about it. The first stop was a cattle truck with sound effects to show a tiny bit of how it might have been. Only not really, as you could move and get out at any time!
The other sites told of the history of the building, how it had been intended to arm and fire up to 12 V2 rockets per day. However, a huge bombing raid in 1943 destroyed much of the work in progress (and, sadly, many of the slave labourers who had to work on it), and they cut back on their plans. I think it did still provide liquid oxygen to fuel the rockets, but not the rockets themselves. The Allies finally liberated the site in 1944.
Then we headed off, stopping in a random Auchan for supplies, and we had lunch in its car park, and then again at the Hyper-U in Abbeville for diesel. And so to the Lieu Dieu, a former abbey that now hosts a variety of random countryside activities, and welcomes motor homes under the France Passion scheme. We are the only ones here, surprisingly -another one came in but went away again. Out of one side there is a stream, and on the other a field full of horses! And I can hear poultry and ducks! Lovely.