My mum and I paid a visit to Mt. Coot-tha Botanic Gardens in Toowong when I was back home in Brissie in April. It was one of my favourite places to visit as a child (we had frequent school excursions to the Planetarium) and I always loved the Tropical Dome (there used to be fish in the pond), the lagoon and water lilies. It has been many, many years since I last visited so I was really happy we made time to visit. We took a free guided walk (well recommended) and then drove up around the back of the gardens to the "new" (for me anyway!) lake edged with paperbark trees.
A lovely way to spend a day or afternoon if you are visiting Brisbane.