- Enjoy a fun sightseeing tour to Frankfurt’s popular attractions onboard a open-top double-decker bus - Easily hop on and off at any of the stops, a great idea if you prefer to explore the attractions a little longer - Immerse yourself in the city’s history and culture at Town Hall, Hauptwache, Alte Oper, and more exciting locations - Learn more about the history of the city with the onboard audio guide set to your prefered language