Introduction to the Grand Canyon: The Grand Canyon is located between Shuidonggou and Hongshanbao. It is 4 kilometers long and 10-15 meters deep. The valley is crisscrossed with ravines and strange walls. The deep loess has been washed away by long-term rain. The earth pillars stand abruptly on the wall and have strange shapes, forming an "earth forest" of all kinds of strange things, which makes people marvel at the uncanny craftsmanship of nature.
During the Ming Dynasty, this area became an important part of the Great Wall's "deep trenches and high fortresses" defense system.