The Great Wall of China was started in 221 BC by the Qin dynasty and was further extended during the Ming dynasty between 1364 and 1644. It was intended to protect China from the marauding troops from the north (somewhat similar to the Hadrian Wall across the north of England). The wall extends almost 4000 miles and snakes across mountains, valleys and even one river. It is now one of the major tourist attractions for Chinese and visitors from around the world. As our tour bus climbed the mountain road, we got a few glimpses of the old sections that have not been restored.