If you are looking to experience the literal fusion of these two elements, these festivals are famous for their pyrotechnics:
The intersection of and Hardstyle is a defining characteristic of the genre's "Endshow" culture. While Hardstyle tracks titled "Firework" (often bootlegs or remixes of Katy Perry's pop anthem) are popular in the gym-hardstyle scene, the most "interesting" aspect is the military-grade coordination required to sync massive pyrotechnics with high-BPM kicks. The Symphony of Kicks and Color Firework | Hardstyle
: Famous for indoor fireworks, sometimes even utilizing indoor pyrotechnics that "rain" harmless sparks over the crowd. If you are looking to experience the literal