How are WW1 or WW2 era bombs still regularly found in gardens and houses around UK and Europe?

Question

The day after or week after these were dropped 60-100 years ago, did people not think, there’s a bomb over there we should make it safe.

Edit: I singled out the UK because they discovered a bomb from World War Two today in Plymouth. I know the UK is still in Europe.

In: Other

Answer 1

The bombs dropped from aircraft in WW2 would mostly bury themselves if they didn’t explode. You might think that a hole in a roof or in a road where a bomb had passed through would be noticed, but in bombing raids there’d be a lot of smashed roofs and roads. Besides that, the emergency services under immense pressure and no-one had time to go around keeping track of new holes. They’d just fill them in and carry on.

There’s a map of London where the location of known or suspected unexploded bombs are marked.