Population density maps are always good fun. And this one showing US states is no exception. As picked up on Reddit (the original is on Wikipedia), this map shows what each state would look like ...

Click the button at the bottom of the interactive to select Los Angeles County, for instance, and then click anywhere on the map to generate a (roughly) circular region of (roughly) equal population.

Traditional population density maps are coloured but flat, ... making up 15 per cent of the US population. Clear visible clusters also exist in Florida, Illinois, Georgia and Texas.