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.

Mass Rapid Transit Singapore
S train
Osaka Municipal Subway
Tianjin Metro
London Underground
Beijing Subway
Shanghai Metro
Tokyo Metro
Shenzhen Metro
Paris Metro
Guangzhou Metro
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