Take a look at the remnants of the Mullberry harbour at Arromanches. If you have Canadian connections maybe stop at Vimy on the way to Ypres. Vimy is the Canadian memorial and is high up so has views across the WW1 front and Loos battlefield.
For American history, the cliffs at Pointe du Hoc and cemetery at Coleville,
Perhaps the Bayeux tapestry, 1066 a major date in English history - when our geography. aristocracy, language, law, culture shifted from northern Europe to France.
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