The Tudigong Saddle is located on the section between Shuili and Benggui of the Shuishalian Historic Trail, about 640 meters above sea level. On the saddle there is an abandoned Tiangong Temple and behind it are remnants of earlier buildings.
Shuishalian Historic Trail straddles across Puli Township and Shuili Township of Nantou County, with a total length of about 29 km. The trail is also known as the Tudigong Anling Historic Trail. The construction date is unknown but since the Qing period, the Shuishalian Historic Trail was an important route for the Han people to enter the Toushe Basin, Puli Basin, and Sun Moon Lake Shuishe. In the early days of Japanese rule, it was regarded as an important barrier defense line with policing stations.
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