An anonymous reader writes: Null Island is one of the world's most visited places for directional data that doesn't exist in real life. The Wall Street Journal reports (Warning: source may be paywalled): "In the world of geographic information systems, the island is an apparition that serves a practical purpose. It lies at 'zero-zero,' a mapper's shorthand for zero degrees latitude and zero degrees longitude. By a programming quirk introduced by developers, those are the default coordinates where Google maps and other digital Global Positioning System applications are directed to send the millions of users who make mistakes in their searches. [About seven years ago, Mr. Kelso, who had heard the phrase used by other cartographers, encoded Null Island as the default destination for mistakes into a widely used public-domain digital-mapping data set called Natural Earth, which has been downloaded several million times. On a whim, he made the location at zero-zero appear as a tiny outcrop one-meter square. In no time at all, other mappers gave the 'island' its own natural geography, created a website, and designed T-shirts and a national flag.]" If you're feeling cognitively lazy, you can watch the short animated YouTube video explaining Null Island.