David Cachon, mountain biking on the Great Wall of China

The Great Wall of China is 1000 times longer than any monument ever created. It is the largest civil project ever to be attempted in history. Construction began before the birth of Christ and they were still working on it when Colombus discovered America. Thousands of people died over the years and years of building it. Beyond the tourist attraction there is a very different wall, rarely visited and filmed. Almost unknown and located just above the horizon from where tourists stop to take their selfies. Th