The 470-megalitre (17×10⁶ cu ft) Torrens Lake was created in 1881 with the construction of a weir, landscaping of Elder Park and modification of the river's bank and surrounds into an English formal park.
The lake forms a centrepiece of many Adelaide events and postcard scenes.
Elder Park with its iron rotunda was opened on 28 November 1882.
The Rotunda is a largely Glasgow built 9-metre-high (30 ft) iron bandstand which was funded by Sir Thomas Elder Smith, the park being named after him.

In 1867, prison labour from nearby Adelaide Gaol was used to build a wooden dam near the site of the current weir.
The dam was poorly constructed and almost immediately the Torrens washed it away.
Construction of a permanent concrete weir was begun in November 1880 and completed, at a cost of £7,000, in 1881.
The sluice gates were closed to begin filling the 12-hectare (30-acre) Torrens Lake on 1 July 1881.
At the lake's official opening on 21 July 1881 an estimated 40,000, almost the entire population of Adelaide, attended.
During the 1889 flood, the weir was overwhelmed, its gates jammed, and in trying to free them the weir's designer John Langdon was crippled.
The weir was rebuilt from 1928 to 1929 with its footbridge relocated and the centre section replaced.
The gates can now be fully raised and the river allowed to flow unimpeded.

The "Popeye" boats are privately owned recreational ferries that operate on the lake between Elder Park and the Adelaide Zoo.
The first boat was launched on the Torrens Lake by Gordon Watts in 1935.
It was a 25-foot (7.6 m) boat, built on the banks of the Torrens to hold up to 20 passengers and named Popeye 1.
Watts purchased a former Glenelg cruise boat in 1948 and placed it in service as Popeye 2.
Over the next two years three new jarrah hulled boats were built at Port Adelaide; carrying 40 passengers each they were numbered Popeye 3 through Popeye 5.
Trips on the Popeyes from Elder Park to the zoo became a treasured family outing and the boats hosted weddings and other events.
In March 1962 Keith Altman, owner of riverside eatery "Jolley's Boathouse", took over the Popeyes and introduced recreational paddle boats to the river.
The Popeyes had a brush with royalty in March 1977 with Popeye 5 ferrying Queen Elizabeth II and Prince Philip followed by a choir in Popeye 4.
Prime Minister Malcolm Fraser officially launched three new fibreglass models named Popeyes I, II and III in 1982 as the wooden boats' replacements.
The 470-megalitre (17×10⁶ cu ft) Torrens Lake was created in 1881 with the construction of a weir, landscaping of Elder Park and modification of the river's bank and surrounds into an English formal park. The lake forms a centrepiece of many Adelaide events and postcard scenes. Elder Park with its iron rotunda was opened on 28 November 1882. The Rotunda is a largely Glasgow built 9-metre-high (30 ft) iron bandstand which was funded by Sir Thomas Elder Smith, the park being named after him.
In 1867, prison labour from nearby Adelaide Gaol was used to build a wooden dam near the site of the current weir. The dam was poorly constructed and almost immediately the Torrens washed it away. Construction of a permanent concrete weir was begun in November 1880 and completed, at a cost of £7,000, in 1881. The sluice gates were closed to begin filling the 12-hectare (30-acre) Torrens Lake on 1 July 1881. At the lake's official opening on 21 July 1881 an estimated 40,000, almost the entire population of Adelaide, attended. During the 1889 flood, the weir was overwhelmed, its gates jammed, and in trying to free them the weir's designer John Langdon was crippled. The weir was rebuilt from 1928 to 1929 with its footbridge relocated and the centre section replaced. The gates can now be fully raised and the river allowed to flow unimpeded.
The "Popeye" boats are privately owned recreational ferries that operate on the lake between Elder Park and the Adelaide Zoo. The first boat was launched on the Torrens Lake by Gordon Watts in 1935. It was a 25-foot (7.6 m) boat, built on the banks of the Torrens to hold up to 20 passengers and named Popeye 1. Watts purchased a former Glenelg cruise boat in 1948 and placed it in service as Popeye 2. Over the next two years three new jarrah hulled boats were built at Port Adelaide; carrying 40 passengers each they were numbered Popeye 3 through Popeye 5. Trips on the Popeyes from Elder Park to the zoo became a treasured family outing and the boats hosted weddings and other events. In March 1962 Keith Altman, owner of riverside eatery "Jolley's Boathouse", took over the Popeyes and introduced recreational paddle boats to the river. The Popeyes had a brush with royalty in March 1977 with Popeye 5 ferrying Queen Elizabeth II and Prince Philip followed by a choir in Popeye 4. Prime Minister Malcolm Fraser officially launched three new fibreglass models named Popeyes I, II and III in 1982 as the wooden boats' replacements.
River Torrens