The Great Wall of China is on the bucket lists of many. You may be motivated by the saying that "One won't become a true man unless he makes it to the Great Wall", or you may hold sentiments on the bittersweet story or Marina Abramovic, the Serbian artist who trekked the Great Wall only to break up with her boyfriend Ulay in the late 1980s. But did you know who first commissioned the building of this engineering wonder? What was the source of the labor used to build it? Which sections are the earliest and latest? And, is it just a wall? Browse the online feature to untangle some of the mysteries of this icon of China.