At the time of construction the communists were worried that Prague might be targeted by the West as a great place to drop a nuclear bomb. So they created the metro deep underground to doubly serve as a nuclear bomb shelter.
The London Underground first opened as an underground railway in 1863 and its first electrified underground line opened in 1890, making it the world's oldest metro system.
Námestí Míru (Peace Square) metro escalator in Prague, the longest escalator in EU (length 87 m, vertical span 43.5 m, 533 steps, taking 2 minutes and 21 seconds to ascend or 2 minutes 19 seconds to descend without walking).
The Arsenalna station, reached via an escalator ride that takes five minutes, was constructed at depths of up to 346 feet (105 meters) — the deepest subway platform in the world.
THE world's fastest metro system train is the Maglev or Transrapid which runs by way of magnetic levitation on the Longyang Road to Pudong International Airport line of the Shanghai Metro in China.
Madrid Atocha railway station in Spain's capital city sees an estimated 108 million passengers a year. The original building, named Estación de Mediodía, was opened in 1851. Following a fire that destroyed most of it, the station was rebuilt, opening again in 1892.