Travel Guide to Frankfurt, German Beautiful City. Tourism, Business, Vacation. Glinting with glass, steel and concrete skyscrapers, Frankfurt-on-the-Main (pronounced 'mine') is unlike any other German city. The focal point of a conurbation of 5.5 million inhabitants, 'Mainhattan' is a high-powered finance and business hub, home to one of the world's largest stock exchanges and the gleaming headquarters of the European Central Bank, and famously hosts...