Greenhouses are building or complexes in which plants are grown. By providing a more controlled convenient environment, they expand the growing possibilities for the crops. Inside a greenhouse, gardeners have control over temperature, humidity, soil aeration, soil moisture and drainage, fertility levels, and light. Read more
Situated in the grounds of the Royal Castle of Laeken in Brussels, this enormous complex of greenhouses covers 270,000 square feet. Commissioned by King Leopold II of Belgium, it was built between 1874 and 1895 and includes the Iron Church, a domed greenhouse which served as the Royal Chapel. A whopping 800,000 litres of heating oil are required annually to keep the greenhouse heated. The public are allowed entry once a year, in the spring, for nearly three weeks when the flowers are in bloom.