1. Donauinselfest

2025 Attendance: 2.5 million

Donauinselfest is an annual music festival held in Vienna, Austria. It is one of the largest open-air music festivals in Europe, with over 3 million people attending each year. The festival takes place over the course of three days in late June or early July and features a diverse lineup of musicians and performers from around the globe, including both established and emerging artists.

In addition to music, Donauinselfest also features food, drinks, and other entertainment, such as carnival rides and games. The festival takes place on an island in the Danube River, which runs through the center of Vienna, and is accessible by foot or by public transportation.

Donauinselfest is known for its high-quality lineup of artists and its festive atmosphere. It is a major cultural event in Vienna and attracts music lovers from around Austria and beyond.