Photographs: Kimimasa Mayama/Reuters
There are around 160 metro systems in the world. The first metro system, the London Underground, was opened in 1863.
Let's take a look at 30 busiest subways in the world.
Tokyo Metro, JapanAnnual passenger rides: 3.16 billion
Global rank: 1
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30 busiest subways in the world
Image: A view of Park Kultury metro station in Moscow.Photographs: Denis Sinyakov/Reuters
Moscow Metro, Russia
Annual passenger rides: 2.4 billion
Global rank: 2
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30 busiest subways in the world
Image: A view of a Seoul subway station.Photographs: Stringer/Reuters
Seoul Metro, South Korea
Annual passenger rides: 2.04 billion
Global rank: 3
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30 busiest subways in the world
Image: A man holds an Apple iPad as he travels on the subway in downtown Shanghai.Photographs: Carlos Barria/Reuters
Shanghai Metro, China
Annual passenger rides: 2 billion
Global rank: 4
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30 busiest subways in the world
Image: Beijing subway controllers inside a station.Photographs: Darren Whiteside/Reuters
Beijing Metro, China
Annual passenger rides: 1.84 billion
Global rank: 5
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30 busiest subways in the world
Image: A woman wheels luggage along the subway platform at the 34th Street Penn Station stop in New York.Photographs: Shannon Stapleton/Reuters
New York City Metro, United States
Annual passenger rides: 1.6 billion
Global rank: 6
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30 busiest subways in the world
Image: A view of a metro station in Paris.Photographs: Thomas White/Reuters
Paris Metro, France
Annual passenger rides: 1.5 billion
Global rank: 7
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30 busiest subways in the world
Image: Dancers perform at Mexico City subway station.Photographs: Daniel Aguilar/Reuters
Mexico City, Mexico
Annual passenger rides: 1.4 billion
Global rank: 8
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30 busiest subways in the world
Image: Couples pose for photographers in a subway train during a mass wedding in Hong Kong.Photographs: Kin Cheung/Reuters
Hong Kong
Annual passenger rides: 1.32 billion
Global rank: 9
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30 busiest subways in the world
Image: Vehicles travel in the main street during night time in Guangzhou.Photographs: Kin Cheung/Reuters
Guangzhou, China
Annual passenger rides: 1.18 billion
Global rank: 10
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30 busiest subways in the world
Image: A passenger waits at Blackfriars London Underground station in London.Photographs: Chris Helgren/Reuters
London, United Kingdom
Annual passenger rides: 1.06 billion
Global rank: 11
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30 busiest subways in the world
Image: Passers-by walk under advertisements in the Dotonbori shopping and amusement district in Osaka.Photographs: Issei Kato/Reuters
Osaka, Japan
Annual passenger rides: 877 million
Global rank: 12
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30 busiest subways in the world
Image: People enjoy a warm day on the banks of the Neva River in central St Petersburg.Photographs: Denis Sinyakov/Reuters
St Petersburg, Russia
Annual passenger rides: 829 million
Global rank: 13
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30 busiest subways in the world
Image: Revellers parade in Sao Paulo.Photographs: Paulo Whitaker/Reuters
Sao Paulo, Brazil
Annual passenger rides: 754 million
Global rank: 14
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30 busiest subways in the world
Image: Commuters wait to board an MRT train at a station in Singapore.Photographs: Tim Chong/Reuters
Singapore
Annual passenger rides: 744 million
Global rank: 15
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30 busiest subways in the world
Image: A woman speaks on the phone at a metro station in Cairo.Photographs: Asmaa Waguih/Reuters
Cairo, Egypt
Annual passenger rides: 700 million
Global rank: 16
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30 busiest subways in the world
Image: People wait to get on subway trains in Madrid.Photographs: Susana Vera/Reuters
Madrid, Spain
Annual passenger rides: 642 million
Global rank: 17
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30 busiest subways in the world
Image: A dancer from a Peruvian folkloric group passes through a turnstile at a subway station in Santiago.Photographs: Stringer/Reuters
Santiago, Chile
Annual passenger rides: 621 million
Global rank: 18
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30 busiest subways in the world
Image: A view of the Castle tower shows the Unesco protected medieval city of Cesky Krumlov, 160km south from Prague.Photographs: Stringer/Reuters
Prague, Czech Republic
Annual passenger rides: 585 million
Global rank: 19
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30 busiest subways in the world
Image: A view of Vienna International Center and UN headquarters in Vienna.Photographs: Herwig Prammer/Reuters
Vienna, Austria
Annual passenger rides: 534 million
Global rank: 20
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30 busiest subways in the world
Image: People have a drink at 360, a three-tiered rooftop bar, in Caracas.Photographs: Jorge Silva/Reuters
Caracas, Venezuela
Annual passenger rides: 510 million
Global rank: 21
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30 busiest subways in the world
Image: People are reflected in a shop window as they walk in Potsdamer Street in Berlin.Photographs: Thomas Peter/Reuters
Berlin, Germany
Annual passenger rides: 508 million
Global rank: 22
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30 busiest subways in the world
Image: The Taipei 101 building is seen before Earth Hour in Taipei.Photographs: Pichi Chuang/Reuters
Taipei, Taiwan
Annual passenger rides: 505 million
Global rank: 23
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30 busiest subways in the world
Image: People walk in front Kiev's Opera in downtown Kiev.Photographs: Gleb Garanich/Reuters
Kiev, Ukraine
Annual passenger rides: 502 million
Global rank: 24
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30 busiest subways in the world
Image: A woman speaks on her mobile phone at the midway point of a slope at Shemshak ski resort.Photographs: Caren Firouz/Reuters
Tehran, Iran
Annual passenger rides: 459 million
Global rank: 25
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30 busiest subways in the world
Image: Visitors look at the Earth Room, the world's first 360-degree all-sky image system, in Nagoya.Photographs: Issei Kato/Reuters
Nagoya, Japan
Annual passenger rides: 427 million
Global rank: 26
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30 busiest subways in the world
Image: Overview of Buenos Aires 9 de Julio Avenue.Photographs: Enrique Marcarian/Reuters
Buenos Aires, Argentina
Annual passenger rides: 409 million
Global rank: 27
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30 busiest subways in the world
Image: A mural of praying hands is displayed on the side of a hotel in central Athens.Photographs: Cathal McNaughton/Reuters
Athens, Greece
Annual passenger rides: 388 million
Global rank: 28
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30 busiest subways in the world
Image: A view of Gaudi's Sagrada Familia and Barcelona's skyline.Photographs: Albert Gea/Reuters
Barcelona, Spain
Annual passenger rides: 381 million
Global rank: 29
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30 busiest subways in the world
Image: People relax in sun in Munich's English garden.Photographs: Michaela Rehle/Reuters
Munich, Germany
Annual passenger rides: 360 million
Global rank: 30
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