There is no attraction in Zandvoort named "Saint Zandvoort Castle." Zandvoort is primarily known for its beach, circuit, and nature areas.
Based on available travel information and local directories for Zandvoort, there is no attraction officially named "Saint Zandvoort Castle." It appears this may be a misnomer or a non-existent location. Zandvoort, a coastal town in the Netherlands, is widely recognized for its extensive sandy beach, the Circuit Zandvoort (a Formula 1 race track), and the surrounding Zuid-Kennemerland National Park, which offers opportunities for hiking and wildlife spotting.
Visitors to Zandvoort typically engage in activities related to its natural landscape and motorsport. The town itself has a promenade, various restaurants, and shops catering to tourists. If you are looking for historical castles in the Netherlands, you would need to explore other regions, as Zandvoort does not host such a landmark. It is possible there might be confusion with another site, or it could be a fictional location.