The Great Wall of China,one of the greatest wonders of the world,was enlisted in the World Heritage by UNESCO in 1987.Just like a gigantic dragon,the Great Wall winds up and down across deserts,grasslands,mountains and plateaus,stretching approximately 6,700 kilometers (4,163 miles ) from east to west of China.With a history of more than 2000 years,some of the sections of the great wall are now in ruins or even entirely disappeared.However,it is still one of the most appealing attractions all around the world owing to its architectural grandeur and historical significance.