To preface, this is not actually a castle. It is a new construction built to house a personal family collection. Mostly this is porcelain from the area and some family paintings. Which, in my opinion, are not worth 15 eur per person to see. (For context, the Van Gogh museum is 5 eur more and Rijksmuseum costs 7 euros, Castle de Haar down the road is the same price and way better...) Tour took us about 20-30 minutes to go through the whole place including the grounds. We then tried the restaurant which is outside - it was cold and we asked if the heaters could be turned on, they said no. We ordered soup and they forgot to tell the kitchen, when we asked when it would be coming out they said the kitchen was closed. All in all, not worth a visit and money/time is better spent elsewhere.

The castle was built in the beginning of the 20thC by Jhr van Sypesteyn who was under the impression that a middle-age castle belonging to his ancestors had stood here. He wanted to recreate this. He had built up a fantastic collection including portraits, clocks, weapons and Dutch porcelain. The castle park is lovely and so peaceful. There is a cafe for a coffee or lunch. Weddings are regularly held in the atmospheric hall. You will have a guide who takes you round, its about an hour to see the castle and its collection. English guides are available, you can book a private tour by calling the castle in advance. This is well worth a trip out of Amsterdam or the other tourist centres.