Frankfurt is a large German city situated on both banks of the river Main. Frankfurt is famous for its international trade fairs and the second largest airport in Europe. It is also an important center of business and finance. There are headquarters of many banks and insurance companies in the district of Bankenviertel. The center of Frankfurt is home to some of Europe’s highest skyscrapers, including the 300-meter Commerzbank Tower. Beautifully illuminated skyscrapers can be seen from one of the bridges on the river Main or from the Main Tower viewing platform.