Somewhere along Australia's Stuart Highway, deep in the heart of the outback is Coober Pedy.
It is dug into the red earth of Northern Adelaide in an area known for opal mines and blistering heat. This is Mad Max's back yard.
The eerie outback, littered with rusted cars and red dust is straight from an apocalyptic film set. In 1985 the director George Miller shot the stretch of highway to fame as the setting for Mad Max Beyond Thunderdome.
However, beneath its sci-fi surface there's a whole lot more going on in Coober Pedy - deep below the ground.