An interactive list of the world’s most populated cities may surprise you. Imagine living in the midst of 20 million (or more) people! None of the top 20 cities are in the US. None are in Europe, either, unless you count Istanbul, which lies in two continents. Maps Mania has more information and some tips on how to use the map.
The World's Twenty Largest Cities is actually a bit of a misnomer as the map actually allows you to explore the size of thousands of cities around the world. If you scroll to the end of the map presentation you can explore the map for yourself. Zoom out and you will see that cities around the world have pink circle's representing the relative size of the population. If you click on a city's circle you can view details on the city's actual population size.
-via Nag on the Lake
(Image credit: Ben Morlok)