If you are afraid of the altitude, then immediately turn away their eyes, because this Chinese bridge could well be your worst nightmare. The fact that it is attached to more than 1,400 meters above sea level, on a mountainside is already, in itself, quite scary, but in addition, it is a glass bridge, which is simply terrifying. Installed on the side of the Tianmen mountain in Zhangjiajie National ForestPark in Hunan Province, the bridge is 100 meters long and 1.6 meter wide. It is known as the gateway to the Cliff Dragon Sinuous.