The Great Firewall Of China

You may not actually be able to see the Great Wall of China from space but you can certainly see the Great Firewall of China in action anywhere in the country. 
With the largest population of web users in the world, China also has one of the most restricted internets, with a host of measures employed to make sure that netizens cannot read about sensitive issues nor themselves post - or at least for very long - information the government deems threatening.