where a shallow underground railway got constructef?
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The London Underground
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.
BTS ARMY!!!
The London Underground
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.
BTS ARMY!!!
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