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No. 20 Vienna

21 of 22

Annual Ridership: 534 million

Vienna’s U-Bahn makes stops at prominent sights like the museum quarter and Rathaus. The system was originally built as a tram network in the late 1800s and was later converted into a metro system. (Plans for the subway’s construction were interrupted by World War I and discontinued after the country’s poor postwar economic state.) In its current form, the metro wasn’t operational until the 1970s, but elegant old-world stations like Karlsplatz Stadtbahn recall the transit system’s early days.

Source: World Metro Database, 2011

World's Most Crowded Subways

No. 20 Vienna

Annual Ridership: 534 million

Vienna’s U-Bahn makes stops at prominent sights like the museum quarter and Rathaus. The system was originally built as a tram network in the late 1800s and was later converted into a metro system. (Plans for the subway’s construction were interrupted by World War I and discontinued after the country’s poor postwar economic state.) In its current form, the metro wasn’t operational until the 1970s, but elegant old-world stations like Karlsplatz Stadtbahn recall the transit system’s early days.

Source: World Metro Database, 2011

Frank Gärtner/Alamy

World's Most Crowded Subways

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