This is the First Basin within the Cataract Gorge on the South Esk River.
It is less than 3 km or 2 miles from the CBD of Launceston, Tasmania, Australia.
Launceston has a population of almost 100,000.
http://en.wikipedia.org/wiki/Launceston%2C_Tasmania
http://en.wikipedia.org/wiki/Cataract_Gorge