If you love live theater performances, book yourself some seats for a show at Castellum Theater. Check online for times and prices.
This arts and culture attraction is often on the itineraries of visitors to Alphen aan den Rijn. But Castellum Theater isn't the area's only highlight. Vogelpark Avifauna, Brouwerij de Molen, and Wet 'n Wild are some other interesting attractions close by.