The Royal greenhouses of Laeken
The palace of Laeken near Brussels is the residential castle of the Belgian Royal family. In the garden of this palace you can find the Royal greenhouses. The enormous constructions of steel and glass are built by King Leopold in 1874.
The wintergarden is the heart of the greenhouses complex. The dome-shaped space is 30 meters high and has the ability to let palm trees grow inside. It was the original purpose of the greenhouses to make sure that plants and flowers from Belgium's (former) colony Congo were safe in winter times and still possible to visit by the King. Today the exotic plant collection has a wide diversity.
The Royal gardens are not open to the public, except every year a few weeks in spring.