Along the Zhongheng Highway to Yanzikou, the Liwuxi Canyon becomes even narrower. From here, it extends westward to Cimu Bridge, which is the most popular section of the Liwuxi Canyon. The Yanzikou Trail runs from Yanzikou to Jinheng Bridge. On the way, you can enjoy the Taroko Gorge, Hu Cave, Yongquan, Indian Chief Rock and other landscapes.

Jin Heng Park was built to commemorate Section Chief Jin Heng who unfortunately died during the opening of the Zhongheng Highway. The park contains a statue of Section Chief Jin Heng, a monument to the employees of the Convergence Engineering Office who died in the service, and a small shop. There is a viewing platform outside the shop. , is the best location to appreciate the Indian El Capitan. The Yanzikou Trail can be said to be a trail with topographic, ecological and cultural characteristics.

Jin Heng Park was built to commemorate Section Chief Jin Heng who unfortunately died during the development of the Zhongheng Highway. There is a statue of Section Chief Jin Heng in the park, a monument to the employees who died in the Convergence Engineering Office, and a small shop. The viewing platform outside the shop, It is the best place to appreciate the Indian El Capitan. The Yanzikou Trail can be said to be a trail with topographic, ecological and cultural characteristics.

The topography of Yanzikou was cut and carved by the Liwu River over the ages. The Indian El Capitan is one of the breathtaking masterpieces; the potholes on the limestone cliffs were not carved out by swallows, nor were they carved by swallows. The nest is caused by the erosion of the underground water outlet and the Liwu River. Swallows forage and play in it, hence the name.

First stop pot hole

There are many caves on the mountain wall on the other side of Yanzikou. These are called "pot caves" and are the most distinctive topographic landscape of Yanzikou.

There are two types of potholes. One is the outlet of groundwater. When the groundwater is saturated, it will seep out from the rock cracks. Over time, the rock cracks will be dissolved into caves. After heavy rain, sometimes it can be observed. When you see water columns gushing out from the cave one after another, this is the "spring". Another reason for its formation is erosion from the Liwu River. During the development of Liwu River, the rapid water was sometimes obstructed and formed whirlpools. The whirlpool water drove the river sand and continuously eroded the rock walls. Over a long period of time, the pothole terrain was formed.

How to distinguish these two types of potholes? Generally speaking, the openings of potholes formed by water erosion in the Liwu River almost all face upstream; while the openings of potholes formed by groundwater dissolution generally face downstream.

Second stop Jinheng Park

Jinheng Bridge, about 300 meters west from Yanzikou, spans Ludan Creek, a tributary of Liwu Creek. During the construction of the Zhongheng Highway in the 47th year of the Republic of China, section chief Jin Heng was inspecting the bridge project when he was hit by a rockfall from an earthquake on the wooden plank bridge he was standing on. As a result, he fell into a ravine and died in the line of duty. In order to commemorate him, later generations not only named the newly built bridge Jinheng Bridge, but also built Jinheng Park next to the bridge.

There is a statue of him in the park, as well as an inscription written by Mr. Jingguo.

The Jinheng Bridge was originally a round-hole cement bridge with a very beautiful shape.

Unfortunately, Typhoon Amber struck on August 29, 1986. The rainfall exceeded 1,000 mm that night, and a flash flood broke out, destroying the Jinheng Bridge. Jinheng Park is the high ground at the intersection of Ludan Creek and Liwu Creek. At the highest point there is a pointed pillar-shaped monument to the employees who died in the Convergence Engineering Office of the Highway Bureau to commemorate the employees who died in the Convergence Engineering Office during the construction of the Zhongheng Highway.

The third stop: Indian El Capitan

Looking from the viewing platform of Jinheng Park towards the other side of Liwu Creek, there is a huge marble protruding from Liwu Creek. If you look carefully at the boulder, it looks like the side of a human figure. The eye sockets, nose bridge, chin and dimples are all clearly visible. Coupled with the sparse plants above, the two look like Indians wearing feather crests, which is lifelike and amazing.

This was not created by a stone sculptor, but was carved by the water of Liwu River over a long period of time. The water of Liwu Creek is like a carving knife, and many breathtaking works have been created in Liwu Creek.

The fourth stop: Zhuilu Cliff

Located between Yanzikou and Jiuqu Cave, it is a vertical and steep marble cliff with a width of about 1,200 meters and an altitude of about 1,100 meters. Across the river from the road is the Zuilu Cliff. It is a deep, narrow and upright cliff formed by the Liwu River cutting through the edge of the Triangular Zui Mountain.

There is a wide section of the road under the cliff where you can park and enjoy the scenery.

Looking up at the cliff, you can barely see the top of the cliff. The rock wall cuts the sky into a thin crack. The landscape is majestic and strange. The wall is bare and there are only a few rock growths. Plants cling to the rocks, making them even more intricate and impressive.

The Zhuilu Ancient Trail on the cliff is the only historical preservation area in Taroko National Park and is the remaining relic of the Hehuan Crossing Ancient Trail.