The way downstairs to the metro is so long that I was a little bit afraid and couldn't see the end of it. It is said that the second longest elevator of metros in Asia is in Chongqing, China. So I think maybe the longest is here because many metros are in historical sites that very down the ground like bomb shelters.
After looking into the background, the Lenin Moscow subway system is recognized as the world’s seventh largest subway system according to the operating line length for the global and the fourth busiest metro. On May 15, 1935, the Soviet government for military reasons officially opened the Moscow subway. The underground railroad built for wartime protection that more than 4,000,000 residents can be covered up....