Best mapped areas

I’m looking for information about best mapped city/region/e.t.c.

Do You know any elaboration or where to find some data which areas are best mapped?

Best mapped I mean information about roads, POIs and building shapes.

All the information will be useful to me.

Thanks.

Hi that question has been out here before, search for it and ask the manager of the question which answers arose.

https://forum.openstreetmap.org/viewforum.php?id=23 - możesz spytać na polskim forum (patrząc po nicku). W Polsce trochę takich znajdziesz.