- About 20km of highway heading west out of Paris - A few Maginot Line Ouvrages used as mushroom farms - People are scratching their heads about those German submarine pens the Navy's not using any more and which are sitting on prime real estate, but would be really, really difficult to remove. - Hundreds of tons of unexploded ordnance are still found each year, though to be fair a lot of it are actually WWI leftovers. - For that matter, there still are dozens of Hindenburg Line pillboxes dotting the Northern countryside. - And there still are a few closed-off areas around Verdun that were deemed too dangerous even for German POWs after both World Wars. - Lots of war graves. - Translated versions of a number of German songs, like Westerwald or Panzerlied, are widely sung in the French Army though this is officially frowned upon. A friend of mine told me how his whole St-Cyr class was consigned to quarters because the whole mess went through a rendition of said Westerwald with visiting Bundeswehr cadets one evening.