Bute Park is often considered one the jewels in the crown of Cardiff .
The capital has enjoyed the huge open space for almost 70 years with thousands of people walking through it each day.
But there's one part that has been closed off to the public - a secret garden hidden behind tall red-brick walls.
If you've ever walked past them chances are you've wondered what's behind the walls, and now for the first time they've been opened to the public.
Bute Park first opened to the public in the spring of 1949, and the secret garden has been opened in celebration of the anniversary.
The nurseries, which had previously been hidden away behind the tall red-brick walls at one end of the parks famous herbaceous border, provide the plants and flowers for all Cardiff’s parks and city centre planters.
Cabinet member for culture and leisure councillor Peter Bradbury said: “Cardiff wouldn’t be Cardiff without Bute Park - it’s been the green heart of the city for 70 years now and that deserves a celebration.
"The team at Bute Park have a wealth of experience – this is a great chance to learn from them, discover more about the park and find out all about the fantastic work going on behind the walls."
An event was held on Saturday to celebrate the anniversary and to mark the official public opening of the Bute Park Nurseries.
Various talks were held, including one from the park's resident bee keeper, and a statue was unveiled.
Before it became Bute Park as we know it, the area had a variety of uses.
From the 1100s the land was made up of a patchwork of different uses and ownerships. The land was dominated by the castle and the river and was used for agriculture, cottage industries and religion.
In 1766 wealthy landowners, the Bute family, inherited the castle and by the late 1800s had begun to develop the grounds.
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The land surrounding the castle was brought together and pleasure gardens were created. Andrew Pettigrew worked closely with architect William Burgess to create a landscape that went with the ornate work of the castle.
In 1947 the Fifth Marquess of Bute gifted the Castle and grounds to the people of Cardiff and the land was turned in to a public park.
