This is a really beautiful place where you can go take a stroll and learn a little about plants, flowers and trees. The picturesque landscaping makes for a nice backdrop for great photo ops.
I haven't been there since before the hurricanes last year, but from what I understand, they are up and running and almost fully recovered.
They don't charge admittance, but you can (and should... play nice!) leave a donation.
They are always offering classes like flower arranging and such, so if you're interested in horticulture or just learning something new, this is a good place to start.