Opened in Llanarthne, Carmarthenshire, in May 2000, the National Botanic Garden of Wales became the first botanic garden of the new millennium.
Spanning 560 acres of former Regency parkland, the site is home to over 8,000 different plant species, from all around the world.
This year there were big plans to celebrate its 20th birthday, but they've been put on hold.
The garden is the most visited in Wales - around 2.5 million people have passed through its gates in the past two decades.
But it hasn't always been plain sailing - the attraction was twice bailed out by emergency grants.
Director Huw Francis says it has been "twenty years of development".
When we first started it was a young, new garden it was the first botanic garden of the new millennium, and we've matured substantially over that period of time it's now well established we're a world leading centre of excellence and world-renowned for the work that we do.
The team at the garden say their mission is to inspire, educate and conserve, and they hope to be doing all that and more in the next 20 years.