Yes agree fagey, the Falaise Pocket tour is very interesting. It's where the Germans were cornered and then bombarded into the ground by Allied airpower. You need to follow the signs saying "L'Encirque".
Alternatively, and in keeping with the motorsport theme, there is an amazingly good Go-Kart and Quadbike track at Deauville if you have a whole day to spare. There's a good Crazy Golf course too, which we had a real hoot doing last year.