Hangu Pass Historical and Cultural Tourism Zone is a national AAAA tourism zone. It is one of the earliest forts in China. Located in the valley, visiting it is like a cave adventure. The main tourist spots include Taichu Palace, Daosheng Palace and the Taoist health preservation parks. It was a historic battlefield where war horses galloped and the place where Laozi, a thinker and philosopher in ancient China, composed Tao Te Ching. For thousands of years, Taoists from home and abroad have come here to pay tribute to Taoism and honor the forefathers of Taoism.