Brussels is getting down and dirty with this decidedly underground event. The Listen Festival and the Hangar collective have announced an exceptional B2B: a massive rave in the Cinquantenaire Tunnel. On April 4 and 5, 2026, they’ll transform this unlikely thoroughfare into an underground venue with two stages and an explosive techno lineup for The Tunnels 2026.
The news was posted on the social media accounts of Listen Festival and Hangar on Thursday, March 12. Originally planned as a one-day event (on April 4), they announced the addition of a second day to delight techno fans.
The first day, already completely sold out, will feature one of the hottest DJs of the moment, KI/KI, taking the reins for a session where acid techno and trance blend with the raw energy of the rave. And that’s just the beginning. The bombshell has just dropped: Marcel Dettmann rounds out the lineup to extend the adventure through the smoke-filled corridors of the tunnel.
This isn’t the first time Listen Festival has reinvented Brussels venues: the festival, known for taking over unconventional spaces ( train stations, tunnels, iconic clubs), turns the city into a veritable playground of sound where electronic, house, techno, and dance music coexist in an unbridled musical celebration.
Ticket info: the final tickets are about to go on sale, so if you want to dance underground in the heart of Brussels with KI/KI and Marcel Dettmann, keep an eye on the festival’s official website and grab your tickets here!
Why this event is already a cult classic
- A unique venue: the tunnels of Cinquantenaire Park transformed into a day-and-night rave, a truly immersive experience.
- A cutting-edge lineup: KI/KI, a DJ who has taken the international scene by storm, and Marcel Dettmann, one of the most influential artists on the current techno scene.
- Underground vibe: techno and acid echoing underground, an atmosphere that borders on Brussels rave mythology.
- 100% local culture: Listen Festival is an institution that puts Brussels on the global map of must-see electronic music events.
In short, if you want to experience an XXL rave in a setting as unusual as it is electric, this early April event is a must-see of the season in the Belgian capital. Grab your tickets fast before they sell out again.
