China has its Great Wall that used to guard off foreign raiders, Westeros has the Wall in the North to stop white walkers, and since a couple of years, a group of African countries is working on its very own Great Green Wall. Sounds impressive, isn’t it? Truth be told, it’s not a real wall. But one day, it will be great.

The Great Green Wall stretches 11 countries, from Senegal to Djibouti (graph: National Geographic)