The big idea behind these "Maphead" posts—the if you will—is to sniff out geographical oddities. These are places that are somehow unique or weird on the map, often more interesting than they are in real life.
But when it comes to Australia's Lake Hillier, that all depends on what kind of map you're looking at. In the pages of an atlas, it's a pretty boring blue oval on an equally boring little island. But look at Lake Hillier on a digital map, and you won't believe your eyes. In aerial imagery, Lake Hillier is colored a bilious, Pepto-Bismol shade of pink.