This is very relevant to me because I live in Austria and I still remember when I was a kid there was this lake where a lot of ducks lived and I always wanted to go swimming there with the ducks and swans but there was this urban legend that swimming there is not allowed because there is still a “Blindgänger” (a bomb that didn’t explode) somewhere on the ground of the lake. And the older kids used to tell me that if you go swimming there, you might step on it and it will blow up.
I got older and didn’t even remember those stories that the older children told me. To be honest I possibly wouldn’t even believe it but it was about 7 years ago when my Dad called me and asked me if I was still in school. I told him that I was at home and he told me to stay there. When I asked him why he said that they found the bomb.
The story was that an old lady dropped some jewelery into the lake and because we are a small town and (honestly there is a lot to do for the Police but not that much) the Police divers took their gear and took a look if they could find it. And on their way they came across the bomb that was lying on the ground of the lake since World War II. It was not a big one and everybody assumed that it was long dead. Nevertheless a special unit had to come to defuse the bomb under water to bring it up and explode it safely.
And that is just one occasion. There are special teams ins Austria and Germany (and I am pretty sure a lot of other European Countries as well) that are still until today looking for old grenades, land mines and bombs.
Just so you know, the remains of the trenches are the least horrible remains of WWII
They also keep finding old bombs all around Cologne. Just last week they had to clear out one in one of the suburbs so yeah, fuck the trenches, at least they don’t endanger living beings.