Christoph Rehage had a mission: to walk from Beijing, China to his home country Germany. In November, 2007, he took the first step of his great journey. A year later, he was 4,646 km (2,887 mi) away on foot, and even walked through the immense Gobi Desert - Asia’s largest sand and dunes dominated area. When he reached Ürümqi, Rehage had a change of hearts and decided to stop walking (what would you have done?).