These gardens are well worth a visit, particularly to see the cactus gardens, lily lake, bromelia collection, avenue of palms, and the waterfalls. There are free tours of the botanic garden in an electric "buggy" at certain times for people over 60 or those with walking disabilities, but make sure that your name is added to the list for the particular timed tour! There is a good restaurant and a well-stocked gift shop on site. It is easy to get a bus from the botanic gardens to the beaches.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.