The Royal Botanic Gardens Sydney is a botanical garden located in the heart of Sydney, Australia. Established in 1816, it is the oldest scientific institution in Australia, as well as one of the most important botanical institutions in the world. The garden spans over 74 acres and features a wide variety of plant species, many of which are native to Australia.

The Royal Botanic Gardens Sydney is home to a number of different themed gardens, including the Palm Grove, the Australian Rainforest Garden, the Oriental Garden, the Succulent Garden, the Herb Garden, and the Rare and Threatened Plants Garden. The garden also features several notable attractions, such as the Sydney Tropical Centre, which houses a collection of tropical and subtropical plants, and the Calyx, a large glasshouse that features changing exhibitions on plants and their uses.

In addition to its plant collections and attractions, the Royal Botanic Gardens Sydney is also a hub for research and conservation efforts. It is home to the National Herbarium of New South Wales, which contains over 1.2 million plant specimens, as well as a range of laboratories and research facilities. The garden also plays an important role in conservation efforts, with a particular focus on the preservation of Australia's native flora.

The Royal Botanic Gardens Sydney is open to the public every day of the year and offers a range of tours and events, including guided walks, workshops, and concerts. It is a popular destination for tourists and locals alike, offering a peaceful retreat in the heart of one of the world's most vibrant cities.