Pop Quiz: Can You Identify Cities By Density Alone?
The LSE Cities Urban Age Programme created density maps showing the number of people living in each square kilometer of a 100km by 100km area in cities around the world, and The Guardian put the maps into a multiple-choice quiz.
With so many cities around the world represented, the quiz is fairly difficult. I'll admit that I only got 5/10, thanks to luck, context clues, and missing the easiest question on the quiz.
The article also includes a little appeal for the benefits of density.