The capital's greatest musical event. OWF 2022: 03-04 June, Suewiec Horse Racing Track. Orange Warsaw Festival is the largest music festival in Poland's capital with 60,000 people a year dropping in to see huge artists like Kings of Leon, Calvin Harris, Beyonce, Imagine Dragons, Miley Cyrus, Lana Del Rey, Florence + the Machine, Snoop Dogg, Outkast, and David Guetta. More Info below.