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Maps have fascinated people for millennia, but the past few decades have seen an explosion of ways to collect more and better data on people and places, meaning we can make maps previous generations could only dream of—like a map of the most famous Kevin from every state. How did people even get by before then? Here are 22 of the most mind-blowing maps of 2015. Click on the headline to go to the full articles, where you can dig deeper and zoom into all of these maps.

1. A complete map of the relative value of $100 in America.