The Great Wall is usually the highlight of a trip through China. As far as UNESCO world heritage sites, or wonders of the world are concerned, I think it would rank consistently in the top 10. I said it's visible from space, but I was just testing you to see if you'd fall for an old wive's tale... haha I definitely did. Either way! A wall of stone that is longer than a continent is still pretty impressive. This is my adventure I had sleeping on the Great Wall of China Illegal?... Let's call it a grey area.