The Great Wall of China
The Great Wall of China, stretching from the Gobi Desert to the Yellow Sea, is the largest man made structure on earth and is an amazing feat of engineering, labour and sacrifice. The original wall was begun 2000 years ago when China was unified under Emperor Qin Shi Huang to keep out marauding nomads. The construction used hundreds of thousands of political prisoners and an estimated 180 million cubic metres of packed earth. Some sections have now been fully restored but there are some spectacular unrestored sections to explore close to Beijing, and half day, full day and multi day visits can be arranged.