aren't most such artifacts found by starting to dig somewhere? how many artifacts remain buried because you just start building on top without looking what's in the ground? almost every village or city in europe has a history going back millennium or more, burying countless interesting artifacts. many of which probably have already been destroyed in the process.

to find new artifacts the best hope is to look for historical sites that have not been built over already. what i find interesting here is that now with aerial and satellite images and AI search we are able to detect such sites even when they would otherwise be unnoticed by the human eye.