Getting to Het Kasteel

And dead easy it is too, much easier than getting south of the river to De Kuip.

From the Centraal Station, simply catch trams 21 or 23 from the stops just to your left as you leave via the main exit. Direction Woudhoek or Holy. Get off at PC Hooftplein, and it's a 5 minute walk just to your right, then straight ahead to Het Kasteel. The ride takes about 10-12 minutes. 

Alternatively you can take the metro 5 stops from Beurs to Marconiplein. Then it's a slightly longer 10 minute walk north to the ground.