Frankfurt celebrates its museums and its river for three days in a unique combination of art and culture, music and gastronomy directly on the Main in the heart of the city against the wonderful backdrop of the Frankfurt skyline. With approximately 2 million visitors, the extraordinary program offerings of Frankfurt's museums, numerous stage productions and stagings, the Museumsuferfest is one of the largest European cultural festivals. The Museumsuferfest ends with a beautiful fireworks display!
Text source and more information about this event: http://www.museumsuferfest.de/