<P> Barossa Reservoir is a reservoir in the Australian state of South Australia , built between 1899 and 1902 to supply water to Gawler and other northern country areas . Built at a cost of almost £ 170,000 the reservoir was hailed on completion as an engineering marvel , and at a total of 36 metres , was the highest in Australia . The thin arch of the dam retaining wall , curved against the pressure of the water , was an innovation considered radical , and attracted the Reservoir international attention . It was featured in the Scientific American and caused the American Engineers News to remark that its `` boldness of design deserves to rank with the most famous dams in the world '' . Nowadays , the dam is notable for its parabola effect , where a voice can be heard clearly from one side to the other -- over 140 metres , end to end . This unusual acoustic phenomenon is a popular tourist attraction , and has earned the dam the title `` Whispering Wall '' ( see Whispering gallery ) . </P>
<P> Barossa Reservoir is a reservoir in the Australian state of South Australia , built between 1899 and 1902 to supply water to Gawler and other northern country areas . Built at a cost of almost £ 170,000 the reservoir was hailed on completion as an engineering marvel , and at a total of 36 metres , was the highest in Australia . The thin arch of the dam retaining wall , curved against the pressure of the water , was an innovation considered radical , and attracted the Reservoir international attention . It was featured in the Scientific American and caused the American Engineers News to remark that its `` boldness of design deserves to rank with the most famous dams in the world '' . Nowadays , the dam is notable for its parabola effect , where a voice can be heard clearly from one side to the other -- over 140 metres , end to end . This unusual acoustic phenomenon is a popular tourist attraction , and has earned the dam the title `` Whispering Wall '' ( see Whispering gallery ) . </P>
where is the whispering wall in south australia
where is the whispering wall in south australia
Barossa Reservoir South Australia
Barossa Reservoir South Australia