The town has a long-standing (folkloric) feud with Dendermonde (situated north along the river which dates back from the Middle Ages. Aalst, Belgium - Wikipedia Aalst, tourism: TripAdvisor has 7,377 reviews of, aalst, hotels, Attractions, and Restaurants making it your best. Aalst, tourism, aalst, hotels, aalst, bed and Breakfast, aalst. Vacation Packages Flights to, aalst Aalst. Restaurants Things to Do in, aalst Aalst, travel Forum. Aalst (Belgium) Located by the Dender River, in East Flanders, the Tereos Starch Sweeteners plant in Aalst employs 400 people and has more than 140 years of experience in cereal processing.