Introduction to Chengmen Cave: The Chengmen Cave Scenic Area is located in the upper reaches of the Volcano Grand Canyon in Huangyishan Forest Park, Liaoning. It is named "Chengmen Cave" because there is a cave on the volcanic rock wall that resembles a city gate. It has the wonders of volcanoes, the seclusion of river valleys, the interest of mountains and wilderness, and the beauty of humanity.