MAAS INDOOR FESTIVAL | 19.12.26 | VAN NELLE FACTORY Maas is a Rotterdam-based electronic music festival bringing people together through high-energy music, connection and an intimate atmosphere. On December 19th, Maas returns to the iconic Van Nelle Factory, a UNESCO World Heritage Site, for its biggest indoor edition yet. Expect an incredible line-up featuring Diffrent, Saidah, Newtone b2b Entasia, Olivia Lensen and more, combined with an immersive production and a crowd that knows how to bring the energy. Big festival energy. An intimate atmosphere. One connected crowd. This is Maas.