Diecaidong Tunnel is a highway lead to Zhuyufeng peak. It is a man-made miracle created by people. It not only has transport function, but also has the tourist value. Seen from far away, Diecaidong Tunnel winds up in layers like a ladder, and forms the view by eighteen curves. It also called “Gallery in Caves”. Diecaidong Tunnel is composed of 19 caves, with a total length of 4030 m. These tunnels connect with each other, and the height will rise 5 m in each hundred meters. The relative elevation of Diecaidong Tunnel is 912m.

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