The Royal Greenhouses of Laeken are a large complex of mammoth heated greenhouses on the grounds of the Royal Castle of Laeken, official residence of the King of the Belgians and the royal family. Located in northern Brussels, the iron and glass structures include tropical, sub tropical and cold greenhouses. As part of the royal private gardens, they are usually not open to tourist visits. Every spring, the Royal Greenhouses of Laeken are open to the public for 3 weeks. It is an excellent opportunity to see the wonderful architecture of Alphonse Balat, the mentor of Victor Horta, and the many plants in the greenhouses. You can also visit the studio of Queen Elizabeth. - AsNotedIn