Long men jian

Longmen River scenic area is located in the west of Beijing city. It covers an area of about 20 square kilometers and is about 90 kilometers away from the urban area. Longmen River scenic area is dominated by Grand Canyon. The Grand Canyon is 15 kilometers long, the largest in Beijing, and there are dozens of unique landscapes. Longmen river has a unique geological structure and is known as the "northern Geological Museum" by scholars.