China during the years of the cold war, the largest created by human hands dug the cave and had set up an underground nuclear power plant here. established in 1966, with the contribution of 60 thousand soldiers (and closed during the cold war) was opened to tourists in October, facility. Yes, it’s stored in a military base in the mountains of Chongqinq (816 as mentions) is now a tourist destination. 104 thousand spanning 816 ‘ only one part can be seen. Cave rooms and looks like a night club with illumination.