Introduction to Tianlong Bridge: Tianlong Bridge is the first natural bridge on the Yangshui River Gorge, also known as Toudao Bridge. It is tall, heavy, majestic and amazingly majestic. The bridge height is 235m, the bridge thickness is 150m, and the average arch bridge height is 96m. The arch span is 20-75m, with an average of 34m, and the bridge deck width is 147m. There are two holes under the Tianlong Bridge, the Lost Soul Hole and the Side Hole.