Patriotic Carnival at Gilberton Amateur Swimming Club, 11 March 1912 - River Torrens, Gilberton. The photograph shows many spectators on the banks of the water and up the hill from the water. Two swimmers can also be seen standing on planks of wood across the water.
Source - http://collections.slsa.sa.gov.au/resource/PRG+280/1/12/222
You are all set!
Your first Culture Weekly will arrive this week.