Over three days, Donauinselfest draws a jaw-dropping 3 million people. To put that in perspective, that’s more than the entire population of Chicago showing up to listen to bands.
Compare that to Glastonbury in the UK (about 200,000 people) or Lollapalooza in Chicago (around 400,000 across four days). Donauinselfest isn’t just the biggest—it’s absurdly, laughably bigger.
