Introduction to Nantianmen: Nantianmen, due to the steep rock walls on both sides of the canyon, is like an open sky curtain. At dusk, the clouds in the valley are lingering, like a mirage. There is a stone cave at the foot of the canyon that leads directly to Xiangshan Temple, called "Nantianmen Cave". The cave is 730 meters long and was opened in 1995. The cave is entangled with vines, towering ancient trees, and the path is rugged, going up and down, high and low, making it very strenuous.