The gardens behind the Cascades Hotel at Sun City is absolutely awesome. Not gardens in the traditional sense, but a man made forest garden with streams, ponds and waterfalls. At the bottom of the garden there is a small lake with an aviary next to it, so there are bird sounds all the time. Everything is super green as there are so much water around.
On the walk through the gardens visitors will come across several more secluded paths as well as a suspension bridge.