Tomorrowland is a large-scale annual electronic dance music festival held in Boom, Antwerp, Belgium. Taking place within De Schorre provincial recreational park, it held its first edition in 2005, from an idea conceived by brothers Manu and Michiel Beers in 2004. Since then, Tomorrowland has become one of the best known music festivals in the world. It has won numerous accolades and awards, including being voted five times in a row as "best musical event of the year" at the International Dance Music Awards. It employs 80 people year-round for the organisation and 15,000 people during the event.
Tomorrowland's success has led to the creation of spin-off festivals. From 2013 to 2015, the concept was briefly exported to the United States, near Atlanta, under the name TomorrowWorld. In 2015, a festival known as Tomorrowland Brasil was started in Brazil. Since 2019, the festival has set up a winter edition, Tomorrowland Winter, in the ski resort of Alpe d'Huez, France.