The South Australian town of Coober Pedy is the opal* capital of the world, but in summer the temperature can reach 104°.
So the residents moved underground. A three-bedroom cave costs about the same as a house, and you don’t need air conditioning.
*Opal is the national gemstone of Australia, which produces 97% of the world's supply
Like · · Unfollow Post · December 25, 2011 at 8:38pm