Although Arromanches was in a British landing zone, I found this present from the United States in a parking lot next to the place where we had lunch.
Down on the beach was this caisson from the Mulberry harbor, with a bunch more in the background.
A row of caissons appears to have once formed a side of the harbor, or maybe a causeway.
Overlooking the beach is this viewing stand. The tan section of roof behind and to the left of the carousel is part of the D-Day Museum.