Burraston Ponds is great for swimming, especially with the awesome rope swing. Great stargazing and warm water!
Pulling into Mona Reservoir and Burraston Ponds you will see some trees to hang up a hammock and have a relaxing afternoon and evening.
The bonus is that there's an awesome Mona Rope Swing, which makes this a great place to cool off during summer. Make sure to look up at night because the milky way will be incredible since you are far away from any light pollution.
To sum it up, Burraston Ponds is great place to relax!