De Haar Castle is a historic castle located near the town of Haarzuilens, in the province of Utrecht, Netherlands. It was originally built in the 13th century as a moated castle but was later expanded and rebuilt in a neo-Gothic style in the 19th century. The castle is surrounded by a beautiful park, which covers an area of almost 100 hectares. It is now used as a museum and a venue for events, including concerts and exhibitions. Visitors can tour the interior of the castle, which features many original furnishings and works of art, as well as the castle's impressive collection of antique weapons and armor. The castle is also surrounded by a moat and several outbuildings, which are also open to visitors.