Well let me say that I came here because Janet wanted to. It wasn't raining hard out and we wanted to see something of the town. Otherwise we would have arrived later with our other friend for more miles.
It took us about 40 minutes to tour the whole of the garden. We did not go in for the audio tour but walked around and took lots of pics. Ok. She took all the pics. Someone had to hold the umbrella over the camera...
In general they were nice. But I would not pay the $7 each again to do it.