Berlin’s 21st annual Beer Festival takes over Karl-Marx-Allee between Strausberger Platz and Frankfurter Tor. Breweries from all over the world participate, equaling 2.2 km. of beer booths to sample. Admission is free. They’ll be food and 19 stages of live music. This year, special attention will be paid to two breweries from North Rhine-Westfalia, Ernst Barre and Erzquell Brewery Bielstein, who have brewed special beers for the occasion.