Among the most famous tourist attractions in the world, some are entirely manmade, yet they blend into the landscape so well, as if they were entirely natural, that we never give it a second thought. Popeye Village in Malta is a good example. Or Sherlock Holmes’ flat at 221B Baker Street, one of the most famous addresses in London. Of course, 221B never actually existed, and is even located at number 239 on the street!