Vienna Metro System

Vienna Austria is a large city of approximately 1.7 million people.

Like most other large cities, Vienna has traffic congestion issues.  Fortunately, it also has an extensive metro system called the U-Bahn.

Although most U-Bahn trains travel underground, some do surface here and there.

Metro System, Vienna Austria

The above photo below shows a U-Bahn crossing the Wienfluss (canal) in central Vienna.