On your last day in Frankfurt, visit the Main Tower, an iconic skyscraper that offers panoramic views of the city. Take the elevator to the observation deck and enjoy breathtaking vistas of Frankfurt's skyline. Afterward, take a leisurely walk along the riverfront promenade, known as the Museumsufer. Admire the modern architecture, visit the various museums and cultural institutions along the way, and soak up the vibrant atmosphere of this lively area.