Sight Seeing Location
You will find the Barossa Reservoir's Whispering Wall (Dam wall) was built between 1899 and 1903 its almost a perfect acoustic wall, with sound travelling along its full length using your normal voice levels.
Quite place in the middle of knowhere and you can stay as long as you like, once you find some level ground to camp at. You will get some nice photos for your album here
Take the walking track to the old volcano, its a bit on the steep side but stairs have been cut into the rock to make the going easier, and there are a few seats along the way if you need a rest, Don't forget your camera.