There are still many relics in the front section of the trail: the leading stone tablet of Shuidiliao, which was erected by the Japanese in 1901 and where travelers to Dawu would come to worship; the Shengji Pavilion, which was built by Qing soldiers stationed in Shitouying to teach the indigenous people to respect writing; and the original site of Kantouying in the Qing Dynasty and the Japanese police station next to Tiantai Palace. At 7.4K, 14K, and 20.1K of the Dahanlin Road, there are the ruins of Guihua Gate, Liuyi Society, Dashuqian Camp, and Dashulin Garrison respectively. After entering the ancient road, there are ruins of "Jinshuiying Garrison", "Chushuipo Garrison", "Chushuipo Shrine", "Charcoal Kiln", "Xinguzilun Garrison", "Qing Dynasty Xidi Camp Site", "Guzilun Suspension Bridge" and so on along the way.

The trail runs along the belly of Mount Tahan and Mount Kuzilun, and is influenced by the northeast and southwest monsoons and the geographical environment where the tropics and subtropics meet, and has extremely high biological diversity. The forests along the way are lush and green, with more than 700 plant species, including Taiwan's unique or rare species such as the Taiwan Metasequoia, Dawu Rhododendron, Giant Leaf Polygala, Willow-leaved Lithops, Wave-margined Quercus, and Jinshuiying Lithops. At an altitude of about 1,300 meters, there are a large number of ancient relict plants, the Kunlan tree, and dried and fallen fruit bunches can often be seen on the trail.

The trail spans low and medium altitude areas, and there are flowers and leaves blooming in all seasons, especially in spring. From high to low, there are the translucent purple-pink curved-stem indigo, the rare peach-red giant-leafed polygala, the light purple butterfly-like Taiwan violet, the Taiwan sesame flower that is sometimes light red and sometimes purple-red, the red nan with tender new leaves and fine green flowers, the pure white and quiet Alishan root orchid, the Kunlan tree with leaves arranged in whorls, the white and purple wild peony, the small plant and beautiful flowers of the fleshy wild peony, and the white and fragrant mountain peony, etc. The colorful flowers and leaves decorate the ancient trail with bright and elegant beauty. Among them, the giant-leafed Polygala is a rare plant unique to Taiwan. It blooms along the road in spring and is a beautiful flower that cannot be missed.