The Royal Greenhouses of Laeken (French: Serres Royales de Laeken, Dutch: Koninklijke Serres van Laken) are a vast complex of monumental heated greenhouses in the park of the Royal Castle of Laeken in the north of Brussels. The historic complex contains tropical, sub tropical and cold greenhouses. These greenhouses are world-famous, but not a tourist attraction. The greenhouses are part of the Royal Park, and the royal private gardens and usually not open for visitors.