"The mining town where people live under the earth"
CNET:
Australia is a country defined by "the tyranny of distance," but traveling to the underground opal mining town of Coober Pedy feels like taking a holiday on Mars.
...
More than half the residents live buried in the bedrock in cavelike homes called "dugouts" in order to escape freezing winters, scorching summers and the occasional cyclone. Often, the only sign you're walking on someone's roof is the air vent that's sprouted up next to your boots.
...
According to folklore, "kupa piti" in the local indigenous language means "white man's hole."
