Exploring the Deepest Subway Station in the World
The Hongyancun subway station in Chongqing, China, is located at a depth of 116 meters, and the significant air pressure difference often causes travelers to experience ear popping when taking ...
The Hongyancun subway station in Chongqing, China, is located at a depth of 116 meters, and the significant air pressure difference often causes travelers to experience ear popping when taking ...
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