Amazing to think that there are still dead people from WW2 hidden under the soil ordinary people are walking on. Reminds me how there are still unexploded shells popping up here and there in Belgium and France from WW1.
Here in Germany too. My dad even found a hand grenade with some friends when they were kids.
There is a new undetonated bomb found about once per year or so where I live(Aachen). But roman structures are way more common here. Basically every new construction, they dig up a roman wall or something similar, and then they have to get archeologogists to check out if it is significant enough to be preserved. The whole city is littered with windows in the floor to see those structures.
Did you hear about the Zone Rouge, which was created after WW1?
According to the Sécurité Civile, the French agency in charge of the land management of Zone Rouge, 300 to 700 more years at this current rate will be needed to clean the area completely.