Join 宗教・スピリチュアリティ upcoming events being held in Aalst. Aalst is a historic city in the Flemish region of Belgium, known for its vibrant cultural scene, including the annual Carnival of Aalst, a raucous celebration with parades, music, and satirical floats, as well as the Kattenstoet, a unique cat-themed festival, and the Aalst Belfry, a UNESCO World Heritage Site and symbol of the city's rich history.