Introduction to the First Overpass of Yanzhao: The "First Overpass of Yanzhao" is located in the west of Yinhe Cave. It is a large natural stone arch bridge, 160 meters long, 120 meters high and 5 meters wide. It is built at two altitudes. Between the thousand-meter peaks, you can see the abyss below, and the clouds and smoke are rolling, which is thrilling. This bridge is as powerful as the Zhangjiajie flyover from the north to the south.