Tutti i voli portano a Londra
Information visualization for La Lettura, Corriere della Sera
Nov 3, 2013
How to read: 
The big concentric rings indicate the average daily number of flights
from Milan to all worldwide cities which are directly connected
City distance from the center of the visualization is proportional
to the number of daily connections
The area of each circle is proportional to the airport traffic of the city
(cities with more than one airport report the total traffic)
source: openflights.org