True further east, here in former Germany, now Poland. Especially throughout the construction and investment boom that's been happening since 00's. Just last year my neighborhood was evacuated.

Unexploded Soviet ordnance - insane how much of it was dropped and buried in the rubble to this day. You're right though - weird to think that nobody would notice, but so much Europe was turned to rubble at that time. These things got turned to unrecognizable rusty mush after a few decades.

Pretty sure it's also an excuse to keep the bomb squad and evacuation procedures in practice. These things are pretty routine, there is no fear or panic. IThey just diffuse and take the thing away to some military range to dispose of it.

"Pretty sure it's also an excuse to keep the bomb squad and evacuation procedures in practice."

Definitely not in this eastern part of germany where I live. Every major construction needs to check for bombs, but it also happens randomly that a excavator finds a bomb.

There were just a looot of bombs that were dropped. (And they don't always move it, often it is too rusty also to defuse and then controlled explosion if the surroundings allow it (they use lots of water bags on top, witnessed it once))

Defuse. Diffuse has a different meaning.