A while back, I asked "Is the North actually empty?" I'd seen maps that suggest large swaths of completely uninhabited land, and I was wondering whether they're genuinely empty or just sparsely populated.
Today I stumbled upon this cool map of North America showing a dot for every person reported in the Canada and US censuses. Based on this map, it appears that large swaths of the North are actually completely devoid of human habitation. You can zoom in and get a full page of white, with no dots whatsoever.
That's awesome, in both senses of the word.