The tunnel also has a long history. Since the Viet Nam war is used as a hideout from the explosion for a meeting of the force via the product into the battle with United States. The tunnel was built, with many layers and each layer will have an effective air filter system. For survival of the soldiers inside the tunnel consists of a hospital. Meeting rooms and rooms for tourists who come to enjoy short movies with a story about the war in Viet Nam before. In order to understand the historical background. Counted as one of the most popular locations from succession.