Introduction to Nantianmen: Nantianmen is located at the commanding heights in the southeast of Langya Mountain, surrounded by ancient buildings such as Huifeng Pavilion and Ancient Bixia Palace. From Dengtianmen, you can overlook the Yangtze River like a belt, Zhongshan Mountain like a snail, and the peaks gathering together like a surging tide; the "mirage" scene photographed here on July 3, 1992 is known as an "eternal wonder".