You mean like official EU data? https://ec.europa.eu/eurostat/databrowser/view/demo_r_d3dens/default/map?lang=en And “go see in person” is a very bad advice to anything data-related in most cases. Compating population density anywhere in Europe with Netherlands isn’t fair. Poland, Hungary and Romania (and north Balkan as well, it seems) have denser population than rural France, for example. Spain is less densely populated, but still has about as many tennis courts, so it must have much more per capita. It just isn’t a population density map. It is another Iron curtain division map, but even so, Czechia and Slovakia stand out as exceptions. There is interesting information in there.