Underground Project 131 is a system of tunnels in Hubei province constructed in the late 1960s and the early 1970s to accommodate the Chinese People's Liberation Army command headquarters in case of a nuclear war. The facility was never fully completed or used, and is currently open to visitors as a tourist attraction.
Some of the signage at the site refers to the facility as Chengshuidong Tourist Area.
Wikipedia https://en.wikipedia.org/wiki/Underground_Project_131
Address China
Coordinates 29°50'55" N 114°27'50" E