posted on Jan, 24 2016 @ 10:42 PM
Those things are water dams for stations. You have to remember some of our stations have a land mass greater than most US states.
Its a built up earthen bearm, usually 3 - 4m high. A bore is sunk do the Artesian Basin and used to keep the damn full for cattle as they wander.
That one looks dry, most likely as the station has that area closed off to cattle to keep them contained.
In terms of strange things in the outback, i'll have to dig through my photos and vids from my time flying in the outback as a charter pilot, say
alot of weird things, and odd places