China's vast 816 Nuclear Military Plant (pictured) was designed to manufacture plutonium in the 1960s, but despite being stopped from doing so in 1984, it hasn't been open to the foreign public until this year
Daily Mail: Former top-secret Chinese nuclear bunker that's the world's largest man-made cave at one MILLION square feet is now open to the public
* The 816 Nuclear Military Plant, located in China's Chongqing municipality, used to be a top-secret hideout
* It was designed to manufacture nuclear plutonium in the 1960s but was stopped from doing so in 1984
* For the first time, foreign tourists are invited to explore its vast winding caves and modern light displays
It could be straight out of a Bond movie.
This vast underground cavern, formally a top-secret Chinese nuclear base, has finally opened for tourists to have a poke around.
Hailed as the largest man-made cave in the world, the 816 Nuclear Military Plant, located in the mountains of Fuling district in China's Chongqing municipality, was designed to manufacture plutonium in the 1960s - a 17-year project involving more than 60,000 soldiers.
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Update: Visitors return to old nuclear facility (China Daily)
WNU Editor: I do not know mush about this Chinese bunker, but I have been in one of Moscow's underground bunker complexes. The Moscow complex that I know about is beyond enormous, but I suspect that this Chinese one "takes the cake".