Located down the corner on the right side of the eastern rampart, the Well-Structured Arrow Storehouse is a well-structured arms depot with a diameter of 0.9m. In July, 1986, it was discovered to be an arrow storehouse of the local garrison. Shaped like a water-retention well, bunches of arrows were placed there, which occupied a space of 1m3. The arrow heads are made of copper and the shafts of iron. Owing to rust, the arrows couldn't be separated from each other. This storehouse provides important evidence for the study of military weaponry of the Warring States Period.

The Hangu Stele Forest stretches 100m long from north to south and 40m long east to west. With an area of 4,000m2, there are now 62 steles preserved here, among which are steles of Tang and Song Dynasties, the memorial stele for Yang Zhongsi, the elder brother of Imperial Concubine Yang of the Tang Dynasty and so on. Besides, new steles have been erected by contemporary and modern calligraphers, on which are the inscriptions of literary works related to Hanguguan Pass.

The Taichu Palace is located on the right side of the eastern pass gate. Legend has it that Yinxi welcomed Laozi at Hanguguan Pass and served him as a master. At his request, Laozi completed the Tao Te Ching here. This great work has had an enormous impact on later times. In memory of this event, the Taichu Palace was built at the place where Laozi wrote the book. It was once a Taoist temple.

With classical architecture in the palace style, it was built during the West Zhou Dynasty. On the edges of ridges and gables are carved vivid patterns of rare birds and beasts such as unicorns, lions, tigers, roosters, dogs and so on. In the palace, there is a network of rafters and beams crossing overhead. In this spacious area, no columns could be seen. According to historical records, the present Taichu Palace was built before the Tang Dynasty and renovations have been made through the Yuan, the Ming and the Qing Dynasties. There are now two steles preserved, on which are recorded the story of Laozi passing by Hangu Pass on a blue bull. One was erected in the fourth year of Emperor Dade of Yuan Dynasty and the other in the reign of Emperor Shunzhi of Qing Dynasty.

Starting from the eastern gate of Hanguguan Pass, the Old Path of Hangu stretches across the town and into the west. The only east-west passage through Guogou, Huangheyu, Langpigou to Chousang, it is 15km long. The valleys are 50-70m deep and 10m wide. In the narrow parts, it is only 2-3m wide and the gradient basin ranges from 40 degrees to 80 degrees. At the bottom, there is a road winding into the distance. On each side of the path, the precipitous cliffs and peaks rise abruptly high into the sky, the sight of which fills the people on the road with awe.

Archeological finding indicates the pass town is shaped as an irregular rectangle. The eastern walls stretch 1,800m long, the western walls 1,300m long and the southern walls 180m long. The location of the ruins roughly accords with historical records.