In Cooper Peddy (in the Outback) 60 percent of the people live underground, often in old mines (Outback, South Australia)

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ilse schrama / Alamy Stock Photo
Image ID: BHX4CB
Cooper Peddy is known as the opal capital of the world because of the quantity of precious opals that are mined there. It is also famous for most of the residents living below ground, mostly in old mines refurbished, due to the scorching daytime heat. The name 'Coober Pedy' comes from the local Aboriginal term kupa-piti, which means 'whitemans hole' 'waterhole'.
Location: Cooper Peddy, Outback, South Australia