Great Wall of China the optics much better, rendering photographic evidence irrelevant to the issue of whether it is visible to the naked eye. Great Wall of China The Great Wall of China is a series of fortifications made of stone, brick, tamped earth, wood, and other materials, generally built along an east-to-west line across the historical northern borders of China to protect the Chinese states and empires against the raids and invasions of the various nomadic groups of the Eurasian Steppe with an eye to expansion. Several walls were being built as early as the 7th century BC; these, later joined together and
Underground Great Wall of China that the tunnels are not likely to be breached by conventional or low-yield earth-penetrating nuclear weapons such as the B61-11. Underground Great Wall of China The Underground Great Wall of China ( ) is the informal name for the vast system of tunnels China uses to store and transport mobile intercontinental ballistic missiles. Due to the great secrecy surrounding the tunnels, not much information about them is publicly available; however, it is believed that the tunnels allow for mobile ICBMs to be shuttled around to different silos, and possibly stored in reinforced underground bunkers. This greatly enhances the ICBM's chance