The Castle Museum Sypesteyn in Loosdrecht is a small but spectacular castle that was built in the 1900s by C.H.C.A van Sypesteyn. The castle was built in 16th century style, using authentic materials wherever possible with bricks, doors, fireplaces, and other items gathered from demolition sites. The castle is home to a museum displaying a collection of paintings from several time periods, along with clock, pottery, ceramics, and various other items, as well rooms decorated in period styles.