Both as a bomb shelter and a nuclear radiation fallout shelter. OR... The Busiest.
Moscow Metro is one of world's busiest metro systems, serving more than seven million passengers daily.
the busiest.
Moscow.
Busiest
Madhya Pradesh
Yes
Many countries, a few include America and Britain who have Subways and the London Underground respectively. Russia also has a the Moscow Metro which is their underground system which was built much later and was one of Stalin's prestige projects, being one of the most extravagant underground railroad service.
No, the only time he used his underground bunker complex was in December of 1941 when deciding whether the Soviet Union should stay and defend Moscow or flee.
A slave is credited with freeing over 700 slaves using the underground railroad
That would be Moscow in Russia with 2.392 billion annual riders. Second is Paris, France with 1.388 billion and third London, England with 1.09 billion.
New York and Moscow and probably many other cities.
Tube station "Park Pobedy" in Moscow. About 87 meters deep.