Where we run: maps of cities using public running data

Hey !

Here is an article showing maps of where we run the most in big cities. I found the idea original and the result is quite beautiful ...

http://www.theguardian.com/lifeandstyle/the-running-blog/gallery/2014/feb/07/where-we-run-maps-of-cities-using-public-running-data-in-pictures