ancient objects found in places where they shouldn't be is a fun rabbit hole indicating that the story we are told about human history is very incomplete. Roman coins found in Illinois, giant skeletons found everywhere, all sorts of interesting stuff. the book "Forbidden Archaeology," while not 100% reliable, is full of cases like this.
https://en.wikipedia.org/wiki/Out-of-place_artifacthttps://listverse.com/2007/10/01/top-10-out-of-place-artefacts/ 