Dating back to the 19th century the Royal Greenhouses of Laeken in Brussels are usually closed to the public.
There are more than a dozen greenhouses, each with a different theme, and for a few weeks of the year when the flowers are in full bloom - the doors are open to everyone.
Our Europe Correspondent Briohny Williams has had a sneak peek of what's on offer:
IN: NAT OF WALKING
OUT: STND OUT
DUR: 2:48
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