Go to agree with Tarjak, Pegasus bridge is definitely worth a look, the original bridge might not be across the river anymore but it's preserved in a nice looking museum nearby:
http://battlefieldsww2.50megs.com/ai...sus_bridge.htm
There's also Dunkirk, and Verdun and the Somme, although they're not World War Two but as we approach the 100th anniversary of the outbreak of World War One, I'd say they'd be worth a look on the way, be sure to visit Messines as well and locate one of the water filled craters left behind by the detonation of the mines before the offensive.
Hope it all goes well, it's a trip I'd like to make myself one day.