If you are someone deeply interested in botany then you must not skip the Royal botanical gardens in Sydney. The place was opened in 1816 which makes it one of the oldest scientific institution not only in Australia but in the whole world.
Location: The Royal botanical garden is located in the Mrs. Macquarie's road in Sydney and the place is quite accessible from most of the major locations in the city.
Highlights: It is one of the major botanical gardens located in the heart of Sydney where you will find plants of a wide variety of species.
Price: The entry is free to all which makes more people come here and explore the place.
Best time to visit: The botanical garden is open from 9 in the morning to 5:30 in the evening so you need to visit the place during these times to be able to see plants that are on the display.