When I was living in The Hague (The Netherlands) there were certain images you would see on a regular base, like the casino, and het Kurhaus,  the lighthouse  in Scheveningen, and of course de Pier and just the beach and the many, many  seagulls. On the other side of the city is the soccer stadium in  het Zuiderpark. If you have seen it all, it's time to throw some darts and have a beer in a cosy bar But if you still want to see some more you can take a windmill tour.
Windmill
Bird on a wing
Windmill2
Horseass