They are still to this day opening sites in France where the coats are hanging on the pegs and rifles are stacked against the wall. Watch the History channel later this year for an exclusive on opening of one the Canadian WW I trenches.
A regular contributor on this site is heavily involved in these projects in France.
An acquaintance in France has discovered the remains of a V-1 launching site on his family farm. It had just become overgrown with bush and trees. The marquis, at the end of the war, had blown up part of it but several of the buildings and part of the ramp still exist today. Time stands still in lots of rural France.
The Canadians went through the area (Caen) during the war and there are still fox holes and "relics" to be found in the forest. You have to use your imagination on a lot of the "relics" found, but you can recognize most for what they are/were.
Get caught using a metal detector in France and you are done like a donut by the way.