If you'd love to inject a little more culture into your vacation, put Museum de Gevangenpoort on your must-visit list. Check if guided tours are available or just wander around at your own speed.
This The Hague Center museum is an interesting place to begin your day of sightseeing. There's plenty to see and do in the vicinity, such as Scheveningen Pier, Madurodam, and Peace Palace. Wander around at your leisure at Museum de Gevangenpoort before heading to these other fine sights.