Jiayuguan City is famous for its Jiayuguan Pass. Jiayuguan Pass is the western terminus of the Great Wall, built more than 600 years ago. Its majestic and solid construction is so full of power and grandeur that it has been praised as ' Mighty Pass No.1 under Heaven'. Unlike the Shanhaiguang Pass or the Juyongguagn Pass on the Great Wall, it nestles against Mt. Qilian and Gobi Desert and is therefore imposing in its own way. It was a strategic point at the western section of the Great Wall of Ming Dynasty and is the best preserved pass along the entire length of the wall. It is a magnificent castle, composed of an inner and an outer section, an enclosed gateway, a gate power, watch towers and parapets.