most extensive metro systems in the world

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Busan Subway

Most Extensive Metro Systems In The World

Most Extensive Metro Systems In The World
Busan Subway

The subway system of Busan in South Korea, this underground network has 128 stations along 81 miles of track.

Chicago L
New York City Subway
Tianjin Metro
Bay Area Rapid Transit BART
Tokyo Metro
Mass Transit Railway MTR
S train
Beijing Subway
Osaka Municipal Subway
Berlin S Bahn
Mass Rapid Transit Singapore
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