11 places on Earth that are still unmapped
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Look at a map of a city and you’ll find streets and parks and highways and buildings all clearly indicated. But in some cities, that clarity is just an illusion, at least in part. As BBC Future points out, in cities like Rio de Janeiro in Brazil and Lagos in Nigeria, slums are not delineated on maps – because ‘they aren’t a top priority for those living there’. In fact, many of the world’s largest cities have large impoverished communities.