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

My family grew up close to [here](https://en.m.wikipedia.org/wiki/Beaufort%27s_Dyke) and as far as I’m aware, unexploded ordinance washes up on a regular basis.