London Underground:
World's first metro system, started in 1863
Paris Métro:
Iconic Parisian transit system began in 1900
New York City Subway:
Launched in 1904, a bustling urban network
Boston Subway:
America’s first, started operations in 1897
Berlin U-Bahn:
Historic system, first trains in 1902
Moscow Metro:
Opened in 1935, known for ornate stations
Tokyo Metro:
Started in 1927, a major global hub
Madrid Metro:
Began in 1919, extensive network across city
Vienna U-Bahn:
Launched in 1978, renowned for efficiency
Shanghai Metro:
Oldest line from 1993, rapidly expanding network
Hong Kong MTR:
Started in 1979, critical to city transport
São Paulo Metro:
Began in 1974, a vital Brazilian transit system
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