The Coastline Paradox is a strange idea that says the longer the coastline is, the more accurate it is. It seems strange because it doesn't make sense to think that by adding more lines, the coast would be more accurate. But the way it works is that the smaller the lines (or the more detailed you make them), the more accurate it is. So if you draw a really long, detailed line around the coast of a country, it will be more accurate than if you just draw a few straight lines.