Natural Bridge Cave, which was discovered by four college students inadvertently in 1966, is known as "the landscape is enough to challenge the sculpture masters", due to perfect protection, is still the largest "live" bell milk forest in Texas, becoming a must-visit attraction for tourists. The natural bridge is named after the natural overpass formed by a long lime slate spanning the heights of the two sides at the entrance of its cave. The surface of this area is full of lactodial bushes, which are extremely common, but at two hundred feet underground, it is a magnificent palace. The tour guide here leads tourists into the cave every 30 minutes, and takes an hour and 20 minutes to walk completely. On the way, you have to pass through the stone gate and the plank road that can only be accommodated. There are ladders and rock paths in the cave to climb and climb, and there are also resting platforms to stay by pick. There is also a large "Qingtian Hall" and a winding stone room larger than the football field. You can see different rock textures. The temperature is about 22 degrees Celsius per year, and the humidity is extremely heavy. Tourists should wear cloth shoes or rubber soles to enter the hole.