Tomorrowland is an electronic dance music (EDM) festival that takes place annually in Boom, Belgium. It is one of the most famous and popular EDM festivals in the world, known for its elaborate stage designs and cutting-edge production values.

The festival first began in 2005 and has since grown to become one of the biggest and most popular festivals in the world, attracting around 400,000 visitors each year. The festival typically features a wide range of electronic dance music acts across multiple stages, including headlining acts from a variety of genres such as techno, house, trance, and more.

Tomorrowland has a unique and creative atmosphere, which is created by its attendees who are encouraged to dress up in costumes and participate in various art and performance projects. The festival also features a variety of other activities such as fireworks, laser shows, and interactive art installations.

The festival is known for its elaborate stage designs and cutting-edge production values, which have included everything from giant mechanical robots to massive LED screens and pyrotechnic displays.

It is held annually during the last weekend of July. It has expanded to several other countries and continents such as Tomorrowland Winter, Tomorrowland Brasil, and Tomorrowland around the world.