Nearest capital in Europe
You're viewing a single thread.
I think that these should not be straight lines regarding that the Earth is a sphere. Especially between Moscow and Helsinki.
https://math.univ-lyon1.fr/~alachal/diaporamas/diaporama_cartographie3/Great_Circles.htm
it should also take into account transport feasability to at least some degree, like no one in their right mind would associate narvik with helsinki..
For railway, there is already some neat project for visualising the reach in a certain travel time from any city with a station. https://www.chronotrains.com/de/explore