questionedithistorytranslationsCurrent version This is the accepted version. added by synapsaa Dec. 29, 2018, 11:19 p.m. Where is the biggest open-air music festival in the world organized? AustriaUSASpainRussiaThe Donauinselfest (German for Danube Island Festival) is a free open-air music festival taking place annually at Donauinsel in Vienna, Austria. With over 3 million visitors in 3 days, it's the biggest open-air music festival in the world.synapsaaShare and bring new players to the game!0Very uninterestingToo difficultPoorly writtenIncorrect or questionableCorrect this questionwikipedia → Donauinselfest3Very interesting! wikipedia → Donauinselfestreach: rather globalcountriesfestivalsmusicrecordsVotes +1 Very interesting! Ts +1 Very interesting! I know +1 Very interesting! M