The Mongolian countryside is famously vast and equally flat. Add to that the fact that it is also the world's least densely populated country and it becomes easy to understand how far it is possible to travel without interruption. All of a sudden, over the horizon will emerge a huge statue of Mongolia's greatest historical figure, Genghis Khan. At 50 metres high and covered in the shiniest stainless steel, there is no way you can miss it. Take the elevator to the top and spend some time on Khan's horseback, gazing across the Mongolian steppes. If you want proof of the vastness of Mongolia, that's where you'll find it.