In the US we have the sadly neglected GNIS database, basically place names. I recall recently parsing their data and finding that a bit over ten percent of the

In the US we have the sadly neglected GNIS database, basically place names. I recall recently parsing their data and finding that a bit over ten percent of the place names were "historical," which in this context meant that they no longer existed. Something else might be there, but once another thing was, and it had this name.